SC 4 P 11 2

Protons are small, positively-charged atomic particles

• True

• False

Kyle wanted to see which gum had the most sugar. He chose four different brands of gum. He weighed each piece. Then he chewed each piece for 10 minutes. After that, he let the gum dry and weighed it again. He recorded his data in the table below. What is the independent variable in Kyle's experiment?

• the weight of the final dried gum

• the time chewed

• the change in weight of the gum

• the brand of gum

Tags

NGSS.MS-PS1-2

Elian is testing his hypothesis that the more ripe an orange is, the more Vitamin C it contains. He takes four oranges of varying degrees of ripeness and squeezes samples of juice from each one. He then measures the concentration of Vitamin C in each sample of orange juice. He systematically adds a measured amount of a chemical called a titrant into the orange juice, waiting for its color to change. When its color changes, he knows that the amount of Vitamin C present in the juice is equal to the amount of the titrant he has added, which he can calculate. What does Elian think is the independent variable in this experiment?

• orange ripeness

• amount of titrant

• color of the solution

• amount of Vitamin C per orange

The period table of the elements is a tool used by scientists.

• true

• false

The __________ and _________ make up the majority of an atoms atomic mass.

• protons and electrons

• electrons and neutrons

• protons and neutrons

Tags

NGSS.MS-PS1-1

A diffraction grating can be used to separate white light. When white light is separated by a diffraction grating, it is separated into __________.

• various colors of the visible spectrum

• violet light

• several different speeds of lights

• red, green, and blue light only

Tags

NGSS.MS-PS4-2

What does a wave carry?

• boats

• matter

• energy

• water

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Why can electromagnetic radiation travel through the vacuum of space?

• They require a medium.

• They do not require a medium.

Tags

NGSS.MS-PS2-3

Sarah is completing a lab in which she is required to identify an unknown substance. She records several observations and measurements of the substance. Which of the following properties will be most helpful to Sarah in making a correct identification?

• density

• volume

• mass

• weight

If Troy has a 4 cm³ cube of each of these metals, which cube will have the greatest mass?

• brass

• gold

• iron

• lead