Question

photosynthesis pre - lecture worksheet
name:\tdate:
instructions: you have not yet learned about photosynthesis. use your best guesses and observations to complete this worksheet. there are no wrong answers - just write what you think
section 1: observations of nature

1. what do you think plants need in order to survive?
2. where do animals (including humans) get their oxygen from?
3. how do you think plants get the energy they need to grow?

section 2: true or false warm - up

1. plants make their own food. (true / false)
2. animals can perform photosynthesis. (true / false)
3. plants use sunlight to grow. (true / false)
4. without plants, humans and animals would not survive. (true / false)

section 3: vocabulary preview
below are some important words we will learn in the photosynthesis unit. write what you think each one might mean.
sunlight:
carbon dioxide:
water:
oxygen:
glucose:
chloroplast:
section 4: diagram exploration

Explanation:

1. Plants need sunlight, water, nutrients from soil, and air (carbon - dioxide) to survive.
2. Animals (including humans) get oxygen from plants which produce it during photosynthesis.
3. Plants get energy to grow from sunlight which they use in photosynthesis to make food.
4. True. Plants perform photosynthesis to make their own food.
5. False. Only plants and some algae can perform photosynthesis.
6. True. Sunlight is a key component for photosynthesis which helps plants grow.
7. True. Plants are the primary producers of oxygen and food in most ecosystems, so without them, humans and animals would not survive.

For vocabulary:

• Sunlight: The light from the sun, a source of energy for plants.
• Carbon Dioxide: A gas in the air that plants use for photosynthesis.
• Water: A liquid needed by plants for growth and photosynthesis.
• Oxygen: A gas produced by plants during photosynthesis, needed by animals to breathe.
• Glucose: A type of sugar that plants make as food during photosynthesis.
• Chloroplast: A part of plant cells where photosynthesis occurs.

Answer:

1. Sunlight, water, nutrients, air.
2. From plants.
3. From sunlight.
4. True
5. False
6. True
7. True

Sunlight: The light from the sun, a source of energy for plants.
Carbon Dioxide: A gas in the air that plants use for photosynthesis.
Water: A liquid needed by plants for growth and photosynthesis.
Oxygen: A gas produced by plants during photosynthesis, needed by animals to breathe.
Glucose: A type of sugar that plants make as food during photosynthesis.
Chloroplast: A part of plant cells where photosynthesis occurs.