Photosynthesis & Respiration ⋆˚✿˖°

Grade 8 Science Q1

What does “photo” in photosynthesis mean?

Light

What does “synthesis” in photosynthesis mean?

Putting together

Plants use this process to make their food with the help of sunlight, water, and carbon dioxide.

Photosynthesis

Often known as “Lungs of the World.”

Plants

The tiny openings of plants, present in their leaves, through which they take in carbon dioxide.

Stomata

It is the natural liquid inside a plant or tree.

Raw Sap

It moves water, sugar, and nutrients around the plant to help it grow.

Raw Sap

Tiny pigments that take in sunlight, water, and carbon dioxide and turn them into sugar and oxygen.

Chloroplasts

Used by the plants as their food.

Sugar or Glucose

Green pigment that is found in the chloroplast of the plan

Chlorophyll

It makes the plant look green.

Chlorophyll

It is the sugary liquid that flows through a plant after it has been changed by photosynthesis.

Elaborated Sap

It is a part of a plant that works like a food delivery system.

Phloem

It is a type of plant tissue that transports water and minerals from the roots to the rest of the plant.

Xylem

These are the inner cells in a leaf where most of the plant's photosynthesis happens.

Mesophyll Cells

These cells are found in the middle layer of the leaf (the mesophyll), between the upper and lower layers of the leaf surface.

Mesophyll Cells

What does the xylem carries?

Raw Sap

What is the direction of the xylem?

Upward

Transports water and supports the plant.

Xylem

What is the movement of the xylem?

One-Way

What does the phloem contain?

Elaborated Sap

What is the direction of the phloem?

Up & Down

It feeds the plant.

Phloem

What is the movement of the phloem?

Two-Way

A mix of water and minerals.

Raw Sap

It is found inside the xylem.

Raw Sap

It is found inside the phloem.

Elaborated Sap

Where does the raw sap come from?

Roots

Plants need oxygen to help release energy from glucose.

Respiration

Is the process where plants break down the food (glucose) they made during photosynthesis to get energy.

Respiration

How many main types of respiration are there?

2

What are the main types of respiration?

Aerobic & Anaerobic Respiration

Uses oxygen to break down glucose.

Aerobic Respiration

Happens most of the time in plants.

Aerobic Respiration

Releases a lot of energy (ATP).

Aerobic Respiration

Does NOT use oxygen.

Anaerobic Respiration

Happens when oxygen is not available (like in waterlogged soil).

Anaerobic Respiration

Less energy is produced.

Anaerobic Respiration

May produce alcohol or lactic acid as waste.

Anaerobic Respiration

Which part does respiration mostly happens in plant cells?

Mitochondria

The energy is released is in the from of ___________.

Adenosine Triphosphate (ATP)