8th Science STAAR Review

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

The positive particles of an atom are called:

• electrons 
• positrons 
• neutrons 
• protons 

Tags

NGSS.MS-PS1-1

Which answer best fits a description of why Alfred Wegener is famous?

• German meteorologist that proposed the idea of continental drift
• proposed sea floor spreading
• Canadian geophysicist who combined sea floor spreading and continental drift into Plate Techtonics Theory
• theory that new seafloor is formed when magma is forced upward toward the surface at a mid ocean ridge

Subduction is:

• process by which ocean crust is taken into the trenches and back to the mantle
• theory that new seafloor is formed when magma is forced upward toward the surface at a mid ocean ridge
• plates slide past each other in opposite directions
• a gradual movement of the continents across the Earth's surface over time

Tags

NGSS.MS-ESS2-2

Tectonic plates are:

• largest section of Earth's layers - composed of three layers
• Earth's crust and part of the upper  mantle that are broken into sections
• lowest or deepest layer of the mantle - semi rigid
• landmass in which all continents were once joined together

Tags

NGSS.MS-ESS2-3

What makes it possible for you to see the surface of the moon from Earth?

•  The moon gives off its own light.
• Light from Earth is reflected by the moon's surface.
• Light from Sun is reflected by the moon's surface.
• The moon absorbs sunlight during the day and glows at night.

Tags

NGSS.MS-PS4-2

2H2O + 2N → 4H + 2NO
The chemical symbols on the RIGHT are called:

• products
• reactants
• yields/produces

Tags

NGSS.MS-PS1-5

2H2O + 2N → 4H + 2NO
The chemical symbols on the LEFT are called:

• products
• reactants
• yields/produces

Tags

NGSS.MS-PS1-2

What is the atomic number of an atom with 13 protons, 14 neutrons, and 10 electrons? 

• 1
• 13
• 27
• 37

Tags

NGSS.MS-PS1-1

What is the atomic number of an atom with 13 protons, 14 neutrons, and 10 electrons? 

• 1
• 13
• 27
• 37

Tags

NGSS.MS-PS1-1