The amount of matter in an object is a measure of the object's ________________.

• volume
• density
• mass
• solubility

Tags

NGSS.HS-PS1-7

What is the volume of the rock? The water level is displaced from 20 mL to 23 mL with the rock.

• 3 mL
• 23 mL
• 20 mL
• 43 mL

What is the formula for calculating density?

• Mass ∗ Volume
• Volume ∗ Mass
• Mass ÷ Volume
• Volume ÷ Mass

The states of matter are different in many ways, including shape and volume. These three figures show the particles in a solid, a liquid, and a gas.

Which number is correctly paired with the state of matter?

• 1: liquid

• 2: solid

• 2: liquid

• 3: gas

During an experiment, a student measures the mass of ice and of liquid water and then places the mixture into a freezer for a day. The table shows the data.

What will the student have at the end of the experiment?

• 100 grams of ice

• 125 grams of ice

• 125 grams of liquid water

• 150 grams of liquid water

Mrs. Tamel measured 60 milliliters of hydrogen peroxide into a beaker and measured its temperature. She added yeast to the hydrogen peroxide and stirred the beaker. She measured the temperature at three different times in degrees Celsius. She wrote down her observations in the table.

Which sentence describes her results?

• Stirring caused the temperature to increase and fewer bubbles to form.

• A physical change cause the temperature to decrease and bubbles to form.

• A chemical change caused the temperature to increase and more bubbles to form.

• Mixing two substances caused the temperature to decrease and fewer bubbles to form.

Mr. Bullock is helping Mrs. Julius with a lab. He makes three mixtures of milk and peanut butter. He puts lids on each container and freezes each mixture. Some of his measurements are listed above.

Choose all the statements that describe the patterns in the mixtures.

There are multiple answers to select!

• The weights of the mixtures do not change in the freezer.

• Mr. Bullock added the same amount of milk to each container.

• The total weight is the sum of all ingredients for each mixture.

• Mr. Bullock added the same amount of peanut butter to each container.

Mr. Dixon filled a plastic gas can half full at the gas station. He left the can in the sun while he mowed his lawn. When it came time to fill his lawnmower, the sides of the gas can were pushing out. What happened to mass of the gas?

• The container acts as a closed system. There was a phase change, but the mass stayed the same.

• The container acts as a closed system. There was a phase change so the mass decreased.

• The container acts as an open system. The sun added more particles to it, so the mass increased.

Which are examples of physical changes?

• paper burning

• paper being torn

• water being boiled

• cake being cut

• cake baking

Which are examples of chemical changes?

• baking soda mixed with vinegar creating a gas

• paper being folded

• wood burning

• cake baking

• bending an iron bar