Question

A physical change is

a change in the properties of matter that does not change the identity of the substance.
a change in the properties of matter that changes the identity of the substance.
a change in the chemical makeup of matter.
a change of matter from one substance to an new substance.

Answer 1

@AnimeQueen @angelgirl129 @DullJackel09

Answer 2

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

Answer 3

r u sure

Answer 4

@danicap

Answer 5

@yomamabf @Yolo4mecuite @YanaSidlinskiy

Answer 6

all of the above

Answer 7

there is only one @yomamabf

Answer 8

yes, I am sure

Answer 9

another one

Answer 10

so, it's A

Answer 11

Which of the following is not a physical change?

Dissolving salt in water
Baking a cake
Melting wax
Freezing water

Answer 12

melting wax

Answer 13

which of the following in not necessary for a plant to do photosynthesis?

Carbon Dioxide
Soil
Water
Light

Answer 14

@danicap

Answer 15

it didn't say soil, so

Answer 16

a right

Answer 17

The mass of the products in a reaction is always _______ when compared to the mass of the reactants in a reaction.

greater
lower
equal
inversely proportionate
@danicap

Answer 18

equal

Answer 19

r u sure

Answer 20

yes

Answer 21

Which of the following is a change from a less condensed to a more condensed state of matter?

Boiling
Evaporating
Condensation
Melting

Answer 22

@demonchild99 @danicap

Answer 23

boiling i believe

Answer 24

let me check first

Answer 25

The number of organisms in each trophic level are shown in a

number graph.
number pyramid.
population pyramid.
population graph.
@danicap

Answer 26

number pyramid right

Answer 27

yes

Answer 28

thx

Answer 29

Which of the following elements is an example of a metalloid?

Silicon
Sodium
Silver
Platinum
@danicap

Answer 30

A

Answer 31

What are the products of aerobic respiration?

Glucose and carbon dioxide
Carbon dioxide, water, and energy
Oxygen, water, and energy
Glucose, oxygen, and energy
@danicap

Answer 32

Aerobic respiration occurs when your cells produce energy in the presence of oxygen. Aerobic respiration is the process most living things undergo to use food energy.Respiration is the metabolic process of most living things in which food molecules (glucose) are turned into usable energy for the cell (ATP). It is the anti-process to photosynthesis, in which plants use sunlight and carbon dioxide to build food molecules, releasing oxygen as a waste product.

Answer 33

so, what do you think?

Answer 34

hi

Answer 35

A