ch.1 lesson 1

1.

1 point

an element is a substance that cannot be broken down into any other substances.

True

False

2.

1 point

hydrogen is an example of a pure substance:

True

False

3.

1 point

a property is not a characteristic that belongs to a thing.

True

False

4.

1 point

air is matter.

True

False

5.

1 point

object number 1 is dropped in a liquid. the liquid is not as dense as the object. what will happen to the object?

it will sink in the liquid

it will float in the liquid

6.

1 point

a scientist is conducting an experiment that calls for 4 parts chlorine to 7 parts sodium. to maintain consistency in her experiment, which of the following ratios is proportionate to the ratio in her experiment?

7 to 9

10 to 9

16 to 28

12 to 22

7.

1 point

changing water into ice is a chemical change.

True

False

8.

1 point

which of the following is an example of an element:

wood

plastic

water

oxygen

9.

1 point

every form of matter has two kinds of properties- physical and:

10.

1 point

compounds are substances made up of 2 or more elements chemically combined.

True

False

11.

1 point

fuels can catch fire and burn. when a fuel burns, it combines with oxygen in the air and changes into the substances water and:

12.

1 point

the ability to burn, or flammability, is a chemical property. true or false.

True

False

13.

1 point

a substance is a single kind of matter that is not pure.

True

False

14.

1 point

heterogeneous mixtures can easily be separated into their different parts.

True

False

15.

1 point

the study of matter and how matter changes is:

anything that has density.

anything that has mass and takes up space.

chemistry

16.

1 point

the chemical formula for ammonia is NH3. how many nitrogen atoms are there.

3

0

1

4

17.

1 point

what would you call a material that is not mixed with any other material?

property

pure

physical

solution

18.

1 point

matter is:

anything that has density.

anything that has mass and takes up space.

anything that has volume.

19.

1 point

in a homogenous mixture, the parts are so evenly mixed, it is difficult to separate their parts.

True

False

20.

1 point

rust is an example of something going through what kind of change?

physical

chemical

21.

1 point

a pie gragh shows the results of a presidential election. there were 4 candidates receiving votes. candidate 1 received 32%, candidate 2 received 42%, candidate 3 received 13% of the vote. what percent did candidate 4 receive?

20%

25%

15 degrees

15%

22.

1 point

there are over how many elements:

17

150

100

50

23.

1 point

outside the nucleus, hovering around, are negatively charged particles called:

electrons

neutrons

atoms

24.

1 point

in a pie chart, the number major league baseball players making 5 million dollars a year or more is at 70%. how many degrees would that represent on on the pie chart?

25 degrees

2 degrees

252 degrees

300 degrees

25.

1 point

your popsicle has melted. true or false? it has gone through a chemical change.

True

False

26.

1 point

a ratio tells you the relationship between two or more things.

True

False

27.

1 point

melting butter is an example of physical change.

True

False

28.

1 point

the inside of the nucleus consists of neutrons and:

electrons

asteroids

protons

cells

29.

1 point

name the 3 forms of matter.

solids, liquids, gases

solids, marbles, donuts

30.

1 point

hardness, texture, temperature, and color are examples of:

chemical properties

physical properties

31.

1 point

all matter is made up of tiny particles called:

cells

solids

atoms

light

32.

1 point

in a molecule of water, how many atoms of oxygen are there?

2

0

1

3

33.

1 point

a pure material is not mixed with any other material.

True

False

34.

1 point

a good conductor of heat is:

plastic

rubber

wood

metal