TCI Lesson 22

Bronze is a mixture of three metals: copper, zin, and tin. When these three metals are mixed, their properties change. Read the data in the table. What are the two properties that made bronze different from the metals from which it is made?

• color and hardness

• brittleness and thermal conductivity

• thermal conductivity and electrical conductivity

• color and reactions takes place when exposed to air.

Tags

NGSS.MS-PS1-2

Investigation: In order to make observations about how heat and could affect matter, you and your classmate are doing an experiment using water balloons. The observations you recorded throughout the experiment are listed.

Steps: 1. Stretch the opening of a balloon over the mouth of the bottle.

2. Half fill one container with hot water and half fill the other container with ice.

3. Place the bottle in the hot water container for 60 seconds. Record your observations.

4. Move the bottle to the ice container for 60 seconds. Record your observations.

Observations:

*Balloon inflates when bottle is in hot water container.

*Balloon deflates when bottle is in ice container.

A " Fair Test" is an investigation in which only one variable is tested at a time; all the other variables are kept constant (unchanged). In this investigation with the bottles and balloons, which variable was tested?

• The size of the bottle.

• The color of the balloon.

• The amount of time the bottle was in each container.

• The temperature of the air in the bottle and the balloon.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Conner observes a mixture of two clear liquids in a container to see if a chemical change occurs. Which observation demonstrates the mixture is undergoing a chemical change?

• The mixture remains at a constant temperature.

• A gas forms after the liquids are mixed.

• One liquid floats on top of the other.

• The mixture does not change color.

Tags

Chemical Change

What was changed in the system?

• Particles were added to the system.

• Water was added to the system.

• Heat was added to the system.

• Air was added to the system.

Tags

NGSS.MS-PS1-4

Which state of matter has particles arranged like this?

• solid

• liquid

• gas

Tags

NGSS.5-PS1-1

Which state of matter has particles arranged like this?

• solid

• liquid

• gas

Tags

NGSS.MS-PS1-4

A mixture is:

• Two or more different substances which are physically combined

• Two or more of the same substances combine

• No combination

__________ is needed to power photosynthesis.

• Oxygen from the air

• Water from the ground

• Energy from the sun

• Carbon dioxide from the air

Tags

NGSS.MS-LS1-6

Which of the following is an example of a plant’s food storage?

• an apple

• a turnip

• a flower

• a pine cone

In photosynthesis, the food that plants make is

• oxygen.

• sugar.

• chlorophyll.

• carbon dioxide.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3