SSA Review Chemistry

Which of the following is a mixture?

(circles of different colors represent different types of atoms)

(circles that are touching are chemically bonded)

• 
• 
• 

Tags

NGSS.MS-PS1-1

Which is an example of a physical property?

• rusting

• boiling point

• combustion

• reactivity with water

When acids and bases react, they form _____.

• acids

• bases

• salts

• ammonia

Tags

NGSS.MS-PS1-5

Litmus paper is often used as an indicator to find the pH of a substance and determine if the substance is an acid or base. The procedure for an investigation using litmus paper to classify substances is shown below. The steps of the procedure should be performed in a certain order. Which of the following lists these steps in the order in which they should be performed during the investigation?

• 5, 1, 3, 2, 4, 6, 7

• 5, 2, 4, 3, 1, 6, 7

• 5, 6, 1, 3, 2, 4, 7

• 5, 1, 3, 2, 7, 6, 4

Tags

NGSS.MS-PS1-2

Isabella used litmus paper to study acids and bases. Blue litmus paper turns red when exposed to an acid. Red litmus paper turns blue when exposed to a base. Isabella tested vinegar with blue and red litmus paper. She concluded that vinegar is an acid. Which of the following most likely describes the observations that Isabella made when she tested the vinegar?

• Neither the red litmus paper nor the blue litmus paper changed color.

• The red litmus paper turned blue, and the blue litmus paper turned red.

• The blue litmus paper turned red, and the red litmus paper did not

  change color.

• The blue litmus paper did not change color, and the red litmus paper

  turned blue.

Tags

NGSS.MS-PS1-2

Christian conducts an experiment to test the hypothesis that adding sugar to water increases its boiling point. Christian conducts several trials of the experiment. What does conducting the trials allow Christian to do?

• choose different variables to test

• make sure the results are reliable

• change the hypothesis based on the results

• change the results at the end of the experiment

Hannah conducted an experiment to determine the temperature at which an unknown substance freezes. She conducted multiple trials of her experiment. Then Angel followed Hannah's procedure to verify her results. Which of the following statements best compares what Hannah and Angel did?

• Hannah repeated her experiment, and Angel replicated it.

• Hannah replicated her experiment, and Angel repeated it.

• Hannah and Angel both replicated the experiment.

• Hannah and Angel both repeated the experiment.

Mr. Benjamin asked his class to form four groups. He provided the groups with identical balances, rulers, and metal blocks. He asked each group to use the tools to determine the mass, volume, and density of its block. The table below shows each group's data. Mr. Benjamin informed the class that the actual density of each metal block was 3.21 g/cm³. Which of the following is most likely responsible for differences in the data?

• Group 2 calculated incorrectly.

• Group 2 measured incorrectly.

• Group 3 measured incorrectly.

• Group 3 recorded data incorrectly.

Tags

NGSS.MS-PS1-2

Which of the following is an example of a chemical change?

• Melting ice

• Boiling water

• Burning wood

• Dissolving sugar

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the pH of a neutral solution at 25°C?

• 0

• 7

• 14

• -1