12. A student has a brand new pencil with a mass of 120g. One week later,
after sharpening it a few times, the pencil becomes shorter and it's mass is now
only 90g. Is this an example of a physical or chemical change?
Where is the other 30g of mass from the pencil? Be specific/give details.

Answers

Answer 1
This is a physical change because the components aren’t chemically changing, they are just being shaved off. The 30 g is in the garbage because it was physically shaved off.
Answer 2

Answer:

Water is a polar molecule because one area is ________________ and another area is ______________________.

Explanation:


Related Questions

Which of the following is NOT found in the cell membrane:
Nucleic acids
Cholesterol
Proteins
Galactose
Phospholipids

Answers

Answer:

nucleic acid are not found in the the cell membrane.

Explanation:

They are only found in ribosomes and the nucleus as either DNA or RNA

Answer:

[tex]\boxed {\tt Nucleic \ Acids}[/tex]

Explanation:

Nucleic acids are the monomers of genetic material, such as DNA and RNA. These structures are found in the nucleus and ribosomes because DNA is stored in the nucleus, RNA is made in the nucleus, and RNA is used to make proteins in the ribosome.

Cholesterol, proteins, galactose, and phospholipids are all cell membrane components. Nucleic acids are not. We know they are in the nucleus and ribosomes. Therefore, the correct answer is nucleic acids.

In a woodland ecosystem, the number of species of microorganisms in the soil that do not
harm plants increases. How does this rise in biodiversity affect the sustainability of the
ecosystem?
A The rise in biodiversity makes the ecosystem less sustainable.
B The rise in biodiversity makes the ecosystem more sustainable.
C The rise in biodiversity does not change the sustainability of the ecosystem.
D The rise in biodiversity makes the ecosystem only temporarily less sustainable.

Answers

Answer:

I think it’s B

Explanation:

Veteran trees are home to a variety of invertebrate species because a woodland's diversity is essential (insects, spiders, millipedes, centipedes, etc.), Thus, option B is correct.

What is the rise in biodiversity in woodland ecosystem?

In addition to lichens and fungi. Mature forests also favor bats among other species. Biodiversity in the woodland is a result of structural diversity.

Stability increases with biodiversity in ecosystems, species, and people. For instance, species with numerous populations that are adapted to a wide range of conditions and high genetic diversity are more likely to be able to withstand disturbances, disease, and climate change.

Generally speaking, expanding the variety of habitats or vegetation structures present at a site can be done to increase biodiversity.

Therefore, The rise in biodiversity makes the ecosystem more sustainable.

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Your task is to decide which dig site is most likely to produce Dimetrodon fossils. What kinds of information do you think would be most useful for making your decision?

Answers

To uncover Dimetrodon fossils, researchers must first research the dimetrodon's habitats, then go to modern-day replicas of those past ecosystems.

Dimetrodon fossils:

Because its remains have been discovered in Texas and Oklahoma in the United States, Nova Scotia, Canada, and all throughout Europe, the Dimetrodon is likely to have been well suited to a broad range of environments.

The first fossil was discovered in the nineteenth century, and Edward Drinker Cope named it in 1878.

Find out more information about 'Fossils'.

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Are eukaryotes multicellular or unicellular or both?

Answers

The answer is actually Both

What do seals and birds have in common in the food web?

Answers

Answer:

Well.

Explanation:

Well, for the most part, both seals and birds eat fish.

And, both seals and birds get eaten by sharks.

Which of the following represents the phases of mitosis in their proper sequence?

Answers

Answer:

Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. Some textbooks list five, breaking prophase into an early phase (called prophase) and a late phase (called prometaphase).

Pleaseeee help!!! This is due today!!

Write one page that tells me about your biome (Shrublands).

The pic is stuff I know already.

Answers

Some of the animals are blacktail deer, rabbits, foxes, coyotes, snakes and lizards, and all kinds of birds.

Which term best describes the result of plants and animals having more offspring than will be able to survive

Answers

Answer:

natural selection

Explanation:

This is what I found

natural selection is based on the following principles: In nature, organisms produce more offspring than are able to survive and reproduce.

Hope this helps

Answer: Overproduction.

Explanation:

Occurs when a species produces more offspring than will survive to maturity.

A relationship between living things that depend on the same
resources at the same place and at the same time is called

Answers

Answer:

competition

Explanation:

i searched it up

Answer:

Competition

Explanation:

Competition is a relationship between living things that depend on the same resources. The resources may be food, water, or anything else they both need. Competition occurs whenever the two species try to get the same resources in the same place and at the same time.

could someone please help me out on this? im confused​

Answers

Answer:

Dependent: Reduction

Independent: Solar Energy

Controlled: B

Explanation:

The dependent variable is what is being measured in the lab.

The independent variable is what is being CHANGED by the individual

The control is what is kept the SAME throughout the lab.

Hope this helped!

Can anyone help me with any of these questions? Please

Answers

Answer:

peanut butter - reduces risk of heart disease and lowers cholesterol

egg - protein; cell repair and growth

Bees, which are known for aiding in pollination, help with which process?
A. enabling pollen to grow fruit to encase the sperm and egg
B. enabling pollen to grow a tube to transfer sperm to the egg
C.transferring pollen from the anther to the pistil
D. transferring pollen from the ovule to the ovary
Please hurry and answer for me plz!

Answers

Bees, which are known for aiding in pollination, help with transferring pollen from the anther to the pistil. The correct option is C.

What is pollination?

Transferring pollen grains from a flower's male anther to its female stigma is the process of pollination.

Every living thing, including plants, strives to produce progeny for the following generation. Making seeds is one method through which plants can create progeny.

Bees are necessary for the growth of plants and flowers. They use the pollination process, in which they move microscopic pollen grains from one blossom of one sort of plant to another flower of the same kind.

The transfer of this pollen aids in the growth of the blooms which will ensures that a plant will produce full-bodied fruit and a full set of viable seeds.

Thus, the correct option is C.

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Answer:
c

Explanation:

it was expert verified

BRAINLIST OPPORTUNITY



Which type of infectious agent causes athlete's foot?
O a virus
O a bacterium
O a fungus
O a parasite

Answers

the answer is c. a fungus

Answer:c

Explanation:

What happens to an atom if it gains an electron? *
A.It becomes negative
B.It becomes neutral
C.It becomes positive
D.None of the above

Answers

Answer:

It became negative

Explanation:

What are "Chloroplasts"?

a.an organelle of some eukaryotic cells in which photosynthesis occurs, using the energy of light to make organic compounds from carbon dioxide and water

b.the substance inside a cell, prokaryotic or eukaryotic, including organelles, but
not including the nucleus of a eukaryotic cell

c.membrane-bound organelles in eukaryotic cells in which cellular respiration
takes place, using oxygen to break down glucose to carbon dioxide and water

d.a cell organelle that is essential to cell functions including reproduction, contains
the cell's chromosomes, and is enclosed by a membrane

Answers

Answer:

cloraplast is what makes the plant green

The answer is A because chloroplasts is an organelle of some eukaryotic cells where photosynthesis occurs

HELP PLEASE! fill in the blanks

Answers

Answer:

infectious agents/germs, immune system, circulatory system

Explanation:

Describe how light enters into your eye. Be sure to use the following vocabulary: cornea, pupil, lens, retina, and
optic nerve.

Answers

Answer:

retina

Explanation:

Please help!! I have to label the organelles in this cell plant!

Answers

1) mitochondria
2)nucleus
3)vacuole
4)chloroplast
5) cell wall

2 questions

10. During cell division, the genetic material in a cell needs to duplicate - before
it divides into 2. *
True
Or
False


11. Chromosomes (genetic material) are located outside of the nucleus of the
cell. *
True
ОR
False

Answers

Answer:

10: True

11: Eukaryotic chromosomes and Linear chromosomes are located in the nucleus.. Not outside. So, I think false. But you can pick

Diffusion is an important process in animals and plants.
The movement of many substances into and out of cells occurs by diffusion.
Describe why diffusion is important to animals and plants.
In your answer you should refer to:
• animals
• plants
• examples of the diffusion of named substances.

Answers

Answer:

Diffusion helps animals in respiration. The cells in an animal's body need glucose and oxygen for respiration. Both these are carried in the blood. When blood reaches the cells the molecules of glucose and oxygen diffuse out of the blood and into the cells. As cells use up the glucose and oxygen they produce waste chemicals and carbon dioxide.

Diffusion is a very important process for photosynthesis where carbon dioxide from the stomata diffuses into the leaves and finally into the cells. This helps the plants to photosynthesize and produce more food.

Example for animals: Animals using glucose and oxygen in diffusion.

Examples for plants: Plants using carbon dioxide to photosynthesize.

Choose all that apply. Carbohydrates contain the following elements:

Answers

Answer: carbon, hydrogen, and oxygen

Explanation:

hydrated carbon which results to sugar and oxygen

Explanation:

plz give me brainiest

7. Why is the property of specific heat important to aquatic life?​

Answers

Answer:

Specific heat means amount of heat required to raise a temperature of a particular body, in case of aquatic life the specific heat plays an important role, the organisms living in an aquatic system require an certain body temperature to be maintained in order to survive.

Specific Heat raises the temperature of the water body resulting in Aquatic life to survive.

How many different ELEMENTS are in Na2SO4?
A.)1
B.)3
C.)6
D.)7

Answers

Answer:

D, 7

Explanation:

In one molecule of sodium sulfate, or Na2 SO4, there are seven atoms in all. The chemical formula for this molecule tells us this.

Which of the following abiotic factors can influence the number of plants that can grow in an ecosystem?

Answers

Answer: The most important abiotic factors for plants are light, carbon dioxide, water, temperature, nutrients, and salinity.

What does the term frameshift mean in science

Answers

Answer:

A frameshift mutation is a type of mutation involving the insertion or deletion of a nucleotide in which the number of deleted base pairs is not divisible by three.

Explanation:

Answer:

A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called nucleotides.

HOPE IT WILL HELP U!

Which plant-cell organelle supports and maintains the cell's shape and protects the cell from damage?
O cell membrane
O cell wall
O chloroplast
O vacuole

Answers

Answer:

The answer is the cell wall

the answer is cell wall

Why does DNA need to be extracted from a cell before it can be analyzed?

Answers

Answer:

to study the genetic causes of disease and for the development of diagnostics and drugs.

Explanation:

It is important to extract DNA from a cell in order to study the genetic causes of disease and for the development of diagnostic and drugs. Scientists will use a cell culture system, which is cells from an organism that have either been made to continuously proliferate (grow) or are cancerous in nature (from cancer).

These cells allow us to continue working on experiments where we can change the conditions to determine various cell functions.

What question could you ask about the bones?

Answers

Answer:

How deep were the skulls buried?

What are cat and dog paws adapted for?

Answers

Answer:

Explanation:

The cat and dog paws are adapted for walking, running, climbing and digging. Both the animals can use their front paws and back paws for different needs or just as the situation ahead of the demands.

Energy in ATP is stored between

Answers

Answer:

energy is stored in the bond joining the phosphate groups

Bond joining is correct:)
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