Earth Science

When water is a solid, it is​ (a)   .

• in a frozen state
• a mixture
• made of plasma
• an element

Tags

NGSS.5-PS1-3

The ​ (a)   , or the center part of the atom, is made of protons and neutrons.

• nucleus
• solid
• mixture
• compound

True or False: Quartz is harder than Topaz

• True

• False

True or False: Corundum can scratch Topaz

• True

• False

This can be tested by scratching

• streak

• luster

• fracture

• hardness

This is the hot, liquid rock beneath the earth's surface

• basalt
• magma
• granite
• lava

This is the hot, liquid rock on the earth's surface

• basalt
• magma
• granite
• lava

A rock is a mixture of _______.

• minerals

• rocks and gases
• water and air
• sand and clay