Density & Changes in Matter (SC.8.P.8.3/8.4/9.1/9.2/9.3)

Which of the following materials would have the highest density if each has the same volume?

• Aluminum

• Lead

• Wood

• Water

A student measures the mass and volume of a metal block and calculates its density. Which of the following steps is necessary to ensure accurate results?

• Use a ruler to measure the length of the block

• Use a balance to measure the mass of the block

• Use a thermometer to measure the temperature of the block

• Use a stopwatch to measure the time taken for the block to sink in water

Which property would you use to classify a substance as a metal?

• High solubility in water

• High electrical conductivity

• Low melting point

• Low density

A student is given a sample of an unknown substance. Which of the following properties should they measure to classify the substance?

• Color and shape

• Mass and volume

• Density and melting point

• Temperature and pressure

During a chemical reaction, the mass of the reactants is 50 grams. What should be the mass of the products according to the Law of Conservation of Mass?

• 25 grams

• 50 grams

• 75 grams

• 100 grams

Tags

NGSS.MS-PS1-5

Which of the following best demonstrates the Law of Conservation of Mass?

• A candle burning and producing less mass in ash

• Ice melting into water with no change in mass

• A plant growing and increasing in mass

• Water evaporating and disappearing

Tags

NGSS.MS-PS1-5

Which of the following is a chemical change?

• Melting ice

• Dissolving sugar in water

• Burning wood

• Breaking glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which process is an example of a physical change?

• Rusting of iron

• Baking a cake

• Boiling water

• Digesting food

How does increasing temperature generally affect the rate of a chemical reaction?

• It decreases the rate

• It has no effect on the rate

• It increases the rate

• It stops the reaction

Tags

NGSS.HS-PS1-5

A student observes that a reaction occurs faster when the temperature is increased. What is the most likely explanation for this observation?

• The reactants have more energy and collide more frequently

• The reactants have less energy and collide less frequently

• The products have more energy and form more slowly

• The products have less energy and form more quickly

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5