Shawn is planning a scientific experiment. He wants to learn whether the time of day has an effect on how far the roses in his mother's garden are open. He plans to measure the diameter of each flower on three rose bushes every hour during a week in the spring. What is the independent variable in Shawn's experiment?

• The time of day

• The diameter of the flowers

• The number of flowers

• The time of year

What is the measurement shown here on the triple beam balance?

• 130.2 g

• 132.0 g

• 132.5 g

• 137.0 g

Adrian was mixing chemicals in the science lab when some of the chemicals accidentally splashed up into his eyes. What will Adrian’s teacher tell him to do?

• Flush his eyes with running water for at least 15 minutes.

• Put contact lenses in.

• Put his safety goggles on.

• Look directly into the sun.

Microfossil is viewed under a microscope high power objective. If the magnification of the eyepiece is 10X and the magnification of the high power objective is 40X, how many times larger does the microfossil appear?

• 4

• 4000

• 40

• 400

The matter you see is made of particles you cannot see. The smallest part of an element is a(n) ________.

• element

• mixture

• molecule

• atom

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Substances that cannot be broken down into any other substances by chemical or physical means is a (n) ___________.

• element

• mixture

• molecule

• compound

Two or more different elements chemically combined is a (n) _____________.

• atom

• mixture

• molecule

• compound

On the periodic table, identify the rules for writing element symbols.

• All letters are capitalized

• First letter is capitalized, second letter is lowercase

• All letters are lowercase

• First letter is lowercase, second letter is capitalized

Ashley made a mixture of sugar and water and a mixture of sand and water. Which of the following is true?

• Both mixtures are homogeneous

• Both mixtures are heterogeneous

• The sugar and water is heterogeneous

• The sand and water is heterogeneous

The mass of the cube is 15 grams and the volume is 5 milliliters. What is the density of the cube?