CA1 review 23-24

What physical property of the rock is being measured?

• volume

• mass

• hardness

• weight

Which scientific tool is shown in the diagram?

• triple beam balance

• beaker

• graduated cylinder

• test tube

Tags

NGSS.MS-PS1-2

Before 1982, pennies

were made out of pure copper. However, since copper has become more valuable, pennies are

no longer made of copper. In fact, pennies made after 1982 have a center made of zinc. Copper

is then plated on the outside of the penny so that it’s appearance does not change.

After learning this information in his science class, Derek wanted to see if this was true. To do

this, Derek wanted to determine the density of a 1980 penny.

Which would represent the best hypothesis for Derek’s experiment?

• How is the density of the penny related to its chemical composition?

• The 1980 penny is pure copper if its density is the same as the density of copper.

• If the 1980 penny contains no zinc, then it will not react with water.

• If the chemical composition changes over time, then density will also change.

After completing an experiment, all chemical wastes should be –

• left at your lab station for the next class.

• disposed of according to your instructor’s directions.

• dumped in the sink.

• taken home.

Tags

NGSS.MS-ESS3-3

A student wants to compare sunblock lotions. The student bought three different brands of lotion and did an experiment to see which one best protected the skin. The sun protection factor (SPF) was 30 for all three lotions. The student put equal amounts of each lotion next to each other on one of her arms. The three areas covered by the lotions were the same size. The student observed the three areas for color change after two hours of Sun exposure.

Which of the following is the best testable question for this experiment?

• Which sunscreen smells the best?

• Does more expensive sunscreen work better?

• Which brand of sunscreen prevents color change the most?

• Does a higher SPF affect the amount of color change after two hours?

In this experiment, the student’s dependent variable is –

• The type of suncreen

• the price of suncreen

• the amount of Sun exposure

• the amount of color change

The diagram shows a –

• single atom

• mixture

• cell

• compound

Tags

NGSS.MS-PS1-1

A student studies a sample of the element sulfur and records the following observations.

Which of the following observations describes one or more chemical properties?

• Sulfur is dull and yellow in color.

• Sulfur is odorless

• Sulfur reacts when exposed to air.

• Sulfur is brittle.

The diagram below represents a closed system of a flask with a balloon attached. In the flask, the baking soda mixes with the Hydrochloric Acid (HCl) and the balloon grows.

Which of the following is evidence from the diagram that a chemical reaction occurred?

• the balloon stetching

• production of a gas

• baking soda dissolving

• using a clear flask

Tags

NGSS.MS-PS1-2

Which of the following are the correct chemical symbols of Hydrogen and Oxygen?

• Hydrogen= He

  Oxygen=O

• Hydrogen=Hd

  Oxygen=N

• Hydrogen=H

  Oxygen=O

• Hydrogen=He

  Oxygen=Po

Tags

NGSS.MS-PS1-1