5a 5b 5c

Which statement best explains why the characteristics of table salt are so different from the characteristics of sodium and chlorine?

• When sodium and chlorine combine, a physical change occurs and a new substance is formed.

• When sodium and chlorine combine, a chemical change occurs and a new substance is formed.

• Salt is processed by the evaporation of seawater or mineral-rich spring water.

• Salt is processed from salt mines because pure sodium does not occur in nature.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

A student had a beaker with a small amount of baking soda. The student added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on observation, which of these can the student conclude?

• A chemical reaction produced a gas.

• Only a physical change happened.

• No chemical reaction took place.

• A chemical reaction produced a solid.

Tags

NGSS.MS-PS1-2

According to the table, the largest portion of living matter is made up of which two elements?

• Hydrogen and Oxygen

• Oxygen and Nitrogen

• Nitrogen and Others

• Oxygen and Carbon

• 10

• 21

• 80

• 50

List the steps of the scientific method

d

e

f

c

b

a

Analyze results

Draw conclusions

Communicate results

Conduct experiment

Form a hypothesis

Ask a question

During a science class investigation, a teacher places a small amount of sugar in a beaker and heats it over a candle. Which of the following would be the best evidence that a change in the chemical properties of the sugar has taken place?

• The sugar turns into a liquid.

• The sugar gets hot.

• The sugar turns black.

• The sugar gets larger.

Tags

NGSS.MS-PS1-2

Which processes above can be used as evidence to identify the formation of a new substance?

• Processes A, B, C, and D

• Processes B, C, E, and F

• Processes B, C, D, and F

• Processes C, D, E, and F

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In which of these do particles move slowest?

• matter

• gas

• liquid

• solid

Tags

NGSS.MS-PS1-4

What is measured with a graduated cylinder?

• Passage of time

• Distance from one thing to another

• Weight of an object

• Volume of liquid

A chemical change is a change in:

• the appearance of a substance. 

• the chemical composition of a substance. 

• the type of matter. 

• the way matter is created. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5