7th grade Science Review

What gas is released by plants from the process of photosynthesis?

• air
• carbon dioxide
• oxygen
• hydrogen

Tags

NGSS.MS-LS1-6

What are the products  (what is made)  of photosynthesis?

• Glucose and oxygen
• sunlight energy
• carbon dioxide and water
• chlorophyll 

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which gas is removed from the atmosphere during photosynthesis?

• hydrogen
• oxygen
• nitrogen
• carbon dioxide

Tags

NGSS.MS-LS1-6

A chemical equation is shown below

6CO₂ + 6 H₂O --> C₆H₁₂O₆ + 6O₂

Which observation can be made after analyzing the equation?

• There are no atoms present

• The number of atoms of each element is increased as the reaction occurs

• The number of atoms of each element is decreased as the reaction occurs

• The number of atoms of each element in the reactants equals the number of atoms of each element in the products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A substance that contains only one type of atom is a(n)

• compound
• element
• heterogeneous mixture
• homogeneous mixture

Two or more elements chemically combined:

• an atom
• a compound
• a mixture
• a pure substance

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Tags

NGSS.MS-PS1-1

Salt has a chemical formula of NaCl.  Salt is a...

• Compound
• Element
• Mixture
• None of the Above

Tags

NGSS.MS-PS1-1

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

All cells need energy to function.  Which cell organelle is responsible for producing energy in the cell?

• chloroplasts
• mitochondria
• nucleus
• vacuoles

Tags

NGSS.MS-LS1-7