LCOM Review

What is indicated by a chemical symbol in the periodic table?

• The color of the element

• The atomic mass of the element

• The chemical formula of the element

• The element itself

Which of the following is an example of a chemical reaction?

• Melting ice

• Burning wood

• Breaking glass

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

What information does a chemical equation provide about the substances involved in a reaction?

• The color of the substances

• The amount and type of elements

• The taste of the substances

• The temperature of the reaction

Tags

NGSS.MS-PS1-1

What are the substances on the left side of a chemical equation called?

• Products

• Reactants

• Catalysts

• Solvents

What does the Law of Conservation of Mass state?

• Matter can be created or destroyed during chemical reactions.

• Matter cannot be created or destroyed during chemical reactions.

• Matter can only be created during chemical reactions.

• Matter can only be destroyed during chemical reactions.

Tags

NGSS.MS-PS1-5

How can you verify the conservation of mass in a chemical reaction?

• By changing the reactants.

• By comparing the mass of reactants and products.

• By altering the products.

• By increasing the temperature.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the main purpose of photosynthesis in plants?

• To convert oxygen into carbon dioxide

• To convert carbon dioxide into sugar

• To convert water into oxygen

• To convert glucose into energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is a product of photosynthesis?

• Carbon dioxide

• Water

• Glucose

• Nitrogen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

According to the law of conservation of mass, what must be true about the mass of reactants and products in photosynthesis?

• The mass of reactants is greater than the mass of products

• The mass of reactants is less than the mass of products

• The mass of reactants is equal to the mass of products

• The mass of reactants is unrelated to the mass of products

Tags

NGSS.MS-PS1-5

How many hydrogen (H) atoms are there?

• 3

• 4

• 12

• 7

Tags

NGSS.MS-PS1-1