Question

name

1. what physical properties of nylon and leather make them good materials to use for shoelaces?

a. high density and low conductivity
b. durability and flexibility
c. hardness and durability
d. low viscosity and flexibility

1. filtration can be used to separate mixtures based on

a. their boiling points.
b. their densities.
c. their melting points.
d. the size of their particles.

1. when a physical change occurs in a sample of matter which of the following does not change?

a. shape b. mass
c. volume d. composition

1. flammability is a material’s ability to burn in the presence of

a. hydrogen. b. nitrogen.
c. oxygen. d. carbon dioxide.

1. which of the following is not a clue that a chemical change has occurred?

a. change in color
b. production of a gas
c. formation of a precipitate
d. change in shape

1. which of the following is a chemical change?

a. ice melting
b. ice being carved
c. water boiling
d. water breaking down into hydrogen and oxygen
completion
complete each statement on the line provided.

1. matter that always has exactly the same composition is classified as a(an) __________.
2. an element has a fixed composition because it contains only one type of __________.
3. the substances in a(an) __________ mixture are evenly distributed throughout the mixture.
4. if a spoon gets hot quickly when it is used to stir a pot of soup, it is probably made of __________.

Explanation:

Step1: Analyze question 10

Nylon and leather are used for shoelaces due to their durability and flexibility.

Step2: Analyze question 11

Filtration separates mixtures based on particle - size differences.

Step3: Analyze question 12

In a physical change, composition remains the same.

Step4: Analyze question 13

Flammability is the ability to burn in the presence of oxygen.

Step5: Analyze question 14

Change in shape is not a clue of a chemical change; others are.

Step6: Analyze question 15

Water breaking down into hydrogen and oxygen is a chemical change; others are physical changes.

Step7: Analyze completion question 1

Matter with the same composition is a substance.

Step8: Analyze completion question 2

An element is a pure substance with one type of atom.

Step9: Analyze completion question 3

In a homogeneous mixture, substances are evenly distributed.

Step10: Analyze completion question 4

A spoon that gets hot quickly is probably made of a metal (good conductor).

Answer:

1. b. durability and flexibility
2. d. the size of their particles
3. d. composition
4. c. oxygen
5. d. change in shape
6. d. water breaking down into hydrogen and oxygen

Completion 1: substance
Completion 2: pure substance
Completion 3: homogeneous
Completion 4: metal