Question 1

When conducting an experiment on states of matter, a student is testing the effects of temperature changes on water vapor (gas). The student notices that liquid water molecules begin to form on the side of her beaker as the temperature drops below 100 degrees celsius. What process is the student observing in this experiment as the water vapor (gas) changes to a liquid?

120

evaporation

freezing

condensation

melting

Accepted Answer

condensation

Answer

evaporation

Answer

freezing

Answer

melting

Question 2

A block of ice is sitting outside. The solid ice starts to melt into a liquid. Choose the following statement that is TRUE for this scenario below.

Accepted Answer

the temperature outside must be above 0 degrees celsius

Answer

the temperature must be below 32 degrees celsius

Answer

the temperature must be above 100 degrees celsius

Answer

the temperature outside must be below 0 degrees celsius

Question 3

The following graph shows the temperature of a warm August day in Houston, Texas. If there is a puddle of water on the sidewalk on this day in Houston, Texas, at what time of day will the water begin to evaporate?

Accepted Answer

4 PM

Answer

10 AM

Answer

12 PM

Answer

8 AM

Question 4

Which of the following statements is TRUE about the image below?

Accepted Answer

the vegetable oil is less dense than water because it floats above the water

Answer

the honey is less dense than water because it sinks below the water

Answer

the ping pong ball is more dense than water because it floats above the water

Answer

the nail is more dense than water because it floats above the water

Question 5

Which of the following statements is TRUE about the image below?

Accepted Answer

the nail is the most dense item in the image

Answer

the ping pong ball is the most dense item in the image

Answer

the milk is the most dense item in the image

Answer

the water is the least dense item in the image

Question 6

Would the item in the image below be attracted to a magnet?

Accepted Answer

No

Answer

Yes

Question 7

What is the difference between WEIGHT & MASS?

Accepted Answer

weight measures force of gravity or pull and mass measures how much matter is in an object

Answer

weight is measured in grams and mass is measured in centimeters

Answer

weight measures how much matter is in an object and mass measures force of gravity or pull

Answer

weight is measured in grams and mass is measured in newtons

Question 8

What can we measure with the following tool?

Accepted Answer

mass, in grams (g)

Answer

weight in grams (g)

Answer

force in newtons (N)

Answer

volume in milliliters (mL)

Question 9

When conducting an experiment on the following items below, a student mixes each of them in a beaker of water. Which one is the odd one out? Why?

Accepted Answer

sand, because it is insoluble

Answer

salt, because it soluble

Answer

powdered drink mix, because it is insoluble

Answer

sand, because it is soluble

Question 10

When conducting an experiment on properties of matter, a student uses the following items below. How should the student classify the following items? Which one is the odd one out?

Accepted Answer

The student can classify the items as mixtures & solutions. The lemonade is the odd one out because it is a solution.

Answer

The student can classify the items as mixtures & solutions. The lemonade is the odd one out because it is a mixture.

Answer

The student can classify the items as soluble & insoluble. The lemonade is the odd one out because it is insoluble.

Question 11

What methods/tools would be BEST used to separate the two mixtures in the images below?

Accepted Answer

evaporation, sieve

Answer

condensation, sieve

Answer

evaporation, hands

Answer

filter, hands

Question 12

Based on the information in the table below, what could the materials labeled A, B, & C be?

Accepted Answer

A: paper clip, B: vegetable oil, C: wood

Answer

A: iron nail, B: vegetable oil, C: paper clip

Answer

A: paper clip, B: honey, C: carbon dioxide

Answer

A: aluminum can, B: vegetable oil, C: paper clip

Question 13

What is a common property of matter we could use to classify the following items? (aluminum can, popsicle stick, iron nail, & rock)

Accepted Answer

state of matter, because they are all solid

Answer

relative density, because they all less dense than water

Answer

magnetism, because they are all non-magnetic

Answer

mass, because they all have the same mass

Question 14

True or false: salt and water is a solution.

Accepted Answer

true

Answer

false

Question 15

True or false: the freezing/melting point is 32 degrees celsius

Accepted Answer

false

Answer

true

Question 16

True or false: metals are good thermal & electrical conductors

Accepted Answer

true

Answer

false

Question 17

Fill in the blank: The ability of an object to transfer heat (flows through material easily) is _________ conductivity.

Accepted Answer

thermal

Answer

electrical

Answer

solubility

Answer

magnetic

Question 18

Why do we use oven mitts when baking?

Accepted Answer

Oven mitts are good thermal insulators, so they do not allow thermal energy to easily flow through and burn our hands.

Answer

They protect us from harsh chemical burns when working with chemicals in the lab

Answer

Oven mitts are good electrical insulators, so they do not allow electricity to easily flow through and burn our hands.

Answer

They are stylish

Question 19

Why do we wrap electrical wires in rubber or plastic?

Accepted Answer

These materials are good electrical insulators, so they do not allow electricity to easily flow through.

Answer

These materials are good thermal insulators, so they do not allow thermal energy to easily flow through.

Answer

These materials are good electrical conductors, so they do not allow electricity to easily flow through.

Answer

These materials are good thermal insulators, so they do not allow electricity to easily flow through.

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