HELP PLZ!! Which of the following statements is true?


A the law of conservation of mass states matter can be created or destroyed in chemical reactions.



B atoms of a specific element can have different atomic masses.



C chemical reactions rearrange the atoms in the reactants to yield the products.



D during chemical reactions the number and types of atoms in the reactants is different than the number and types of atoms in the products.

Answer:C

Explanation: The mass in an item can be rearranged to create other items if done properly.

Are most elements on the periodic table nonmetals?

Which statement is true regarding kinetic energy and potential energy?

Both kinetic energy and potential energy rely on motion.


Both kinetic energy and potential energy are stored energy.

Potential energy relies on motion, while kinetic energy is stored energy.


Kinetic energy relies on motion, while potential energy is stored energy.

B in total
pot
5. Lindsey built a clock with 16 divisions, which we'll call Lindsey Hours.
Just like our clocks, the hour-hand on Lindsey's clock goes around twice
per day. How many Lindsey Hours are in one day?
16
-12

Which of the following statements correctly explains why physical properties of a substance can be used to separate mixtures?


1. When substances are mixed together, they retain their physical properties.


2. When substances are mixed together, you can see each individual component


3. When substances are mixed together, the mixture assumes the physical properties of each individual substance.


4. Mixtures contain different substances with different properties and chemists can separate one item from the mixture by forcing it to undergo a chemical change.

Simple and complex molecules are similar in that they both involve ____ atoms A water B simple C bonded D complex

What measures the energy of a wave?

What kind of rocks would you expect to see on Mars? What evidence supports your response?

What is the charge on the Cr in Cr2O72-

In an electrical wire, if instead of copper, plastic wire is used. Would it conduct electricity?Justify your answer.

Which statement is not true?
A. When atoms are combined together they always form molecules
B. When atoms are combined together they always form compounds
C. A molecule has more than one type of the same atom

Atoms are all around us. Which of the following best describes atoms?
A.Specific kinds of liquids
B.Forces that are able to move objects
C.Certain gases found in space
D.Parts of matter too small to be seen

Which statement is NOT true regarding natural vs. synthetic materials?
A) An example of a natural material is sand.
B) An example of a synthetic material is nylon.
C) Synthetic materials are made from natural resources.
D) Synthetic materials only have a negative impact on society.

A.
The net force is acting in an upward direction.

B.
The net force is acting to the left.

C.
The net force is moving to the right.

D.
The net force is zero and all the forces are balanced.

The struggle for existence against other members of an organisms species is
gene flow

genetic drift

Natural Selection

Competition

write a short story using the characteristics of the subatomic particles and their locations in the atom. For example, you need a positive character, a neutral character, and a negative character. You need two different locations. One to be the center location of the story and the other to be outside the center. At a minimum you should have at least 1 paragraph with about 5 sentences. Make sure that you use complete sentences.
Make sure it is school appropriate!!

Two cities were both 100 miles away from the center of an earthquake, but the vibrations reached one city before they reached the other.

Why might the seismic waves have traveled faster to one city than the other?
A.
One city was smaller than the other.

B.
One city was quieter that the other.

C.
It is impossible for waves to travel at different speeds.

D.
They were traveling through different types of rocks.

Describe how the Rube Goldberg device design that you created follows the law of conservation of energy. Be sure to include both parts of the law of conservation of energy in your description.

100 POINTS+BRAINLIEST: How do you balance a chemical equation step by step? Please explain in simple language, give definitions to complex words and provide some rules to remember when balancing the equations. Use C3H8+O2—> H2O+CO2 as an example. THANKS SO MUCH!!!

Why are rocks important to geologists? Check all that apply.


A. They give clues about Earth’s past environments.

B. They present opportunities for future use in technology.

C. They contain valuable resources used for building.

D. Many people like to collect different types of rocks.

E. Rocks are important to modern transportation.

Due in 5! asap please! thanks have a good day!:)

A chemical reaction occurs. Which statement is true of the reactants and the products in the reaction?
A- The atoms in the products were regrouped into different molecules to form the reactants
B- The atoms in the reactants were regrouped into different molecules to form the products
C- The atoms in the products were destroyed and new molecules appeared to form the reactants
D- The atoms in the reactants were destroyed and new molecules appeared to form the products.

A substance that is uniform in composition, made up of two or more atoms in the same place, and NOT chemically combined is a _______________.



element

homogeneous mixture

compound

heterogeneous mixture

Answer for points and brainliest!! :)

What is one way these stems help these cactus plants survive?

A. They take energy from sunlight.
B. They take minerals from soil.
C. They hold the plant in the ground.
D. They make seeds for reproduction.

Make a model that explains how the iron pipes and fertilizer changed into rust.

In the Before space, draw the iron pipes and fertilizer before they changed into rust.
In the After space, draw the rust.
In the During the change space, draw or describe how the iron pipes and fertilizer changed into rust.
Label your model or create a key.

Which statement best describes the relationship between changes in air pressure and wind speeds?

Options:
A. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure.

B. When a high- and a low-pressure air mass are far apart, air moves quickly from low to high pressure.

C. When a high- and a low-pressure air mass are close together, air moves slowly from high to low pressure.

D. When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure.

Witch statement correctly compares the masses of subatomic particles in an atom such as carbon

NOOO LINNKKKSSS
A terrestrial biome characterized by coniferous evergreen tree's is the


A. tundra

B. savanna

C. temperate deciduous forest

D. taiga

Order the terms according to the path followed by oxygen during cellular respiration.

Please help me por favor :'(

Is this statement true or false?
The word planet comes from the Greek word planetai, which means wanderer because the ancient Greeks thought of the planets as wandering through the stars.

True

False
btw this is a science question

Identify all the correct examples of weather