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What is the Law of Conservation of mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

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NGSS.MS-PS1-5

Photosynthesis is the process that captures the ___________ of sunlight and transforms it into the _______________ of sugar.

• chemical energy - solar energy

• kinetic energy to potential energy

• solar energy - chemical energy

• potential energy to kinetic energy

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Plant cells contain a green pigment called chlorophyll. Chlorophyll has a role in the process of photosynthesis. What does chlorophyll do?

• produces the sugar glucose from oxygen

• produces oxygen from the sugar glucose

• absorbs light energy from the sun

• absorbs the sugar glucose form the plant

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NGSS.MS-LS1-6

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Green plants produce their own food during photosynthesis. This image shows the process of photosynthesis. What are the products of photosynthesis?

• carbon dioxide and water

• the sugar glucose and oxygen

• chlorophyll and mitochondria

• chlorophyll and chloroplast

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How do organisms get the energy they need?

• Plants get energy from fertilizers, and animals get energy by drinking water.

• Plants get energy from glucose produced in the soil, and animals get energy directly from sunlight.

• Plants do not require energy because they do not move, and animals get energy by performing exercise.

• Plants produce their own energy through photosynthesis, and animals get energy from eating other organisms.

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The process of cellular respiration makes it possible for Kristine to run on the treadmill and to lift weights. What do her cells do during cellular respiration?

• convert kinetic energy into chemical energy

• absorb light energy through the chlorophyll in their chloroplasts

• break down food molecules to release energy in the form of ATP

• combine water and carbon dioxide to produce oxygen and glucose

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NGSS.MS-LS1-3

Plants provide the materials that animals use in cellular respiration, and animals provide the materials needed by plants for photosynthesis. This image shows the relationship.

According to the diagram, which of these materials does cellular respiration provide that plants use in photosynthesis?

• ATP

• carbon dioxide

• chloroplasts

• mitochondria

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

The organelle where photosynthesis occurs is _________.

• golgi bodies

• cholorophyll

• chloroplast

• mitochondria

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NGSS.MS-LS1-6

Cellular respiration is complete in the ____________.

• golgi body

• mitochondria

• chlorophyll

• chloroplast

Living systems obey the law of conservation of mass. Which of the following statements supports the main ideas of the law of conservation of mass?

• The substances that take part in a chemical reaction are the same as the substances that are formed by the reaction.

• The masses of the substances that take part in a chemical reaction are less than the masses of the substances that are formed.

• The masses of the substances that take part in a chemical reaction are equal to the masses of the substances that are formed.

• The masses of the substances that take part in a chemical reaction are greater than the masses of the substances formed by the reaction.

Tags

NGSS.MS-PS1-5