Plant Notes 2/24/12

Plant Needs All plants need the following items: All plants need the following items: Carbon Dioxide Carbon Dioxide Water Water Sunlight Sunlight Good soil Good soil

Photosynthesis Photosynthesis – the process by which a cell captures the energy in the sunlight and uses it to make food. Photosynthesis – the process by which a cell captures the energy in the sunlight and uses it to make food.

A two stage process During photosynthesis, plants and some other organisms use energy from the sun to convert carbon dioxide and water into oxygen and sugars, called glucose. During photosynthesis, plants and some other organisms use energy from the sun to convert carbon dioxide and water into oxygen and sugars, called glucose.

1 st Stage In plants, the energy from the sun is captured in the leaves and other green parts of the plant. The chloroplasts are the green organelles inside the plant. In plants, the energy from the sun is captured in the leaves and other green parts of the plant. The chloroplasts are the green organelles inside the plant.

The Chloroplasts

Why green? The green color comes from pigments, colored chemical compounds that absorb light. The main pigment in chloroplasts in plants is called chlorophyll. The green color comes from pigments, colored chemical compounds that absorb light. The main pigment in chloroplasts in plants is called chlorophyll.

2 nd Stage Using Energy to make food. Using Energy to make food. The cell uses water (H 2 O) and carbon dioxide (CO 2 ) to produce sugars. The cell uses water (H 2 O) and carbon dioxide (CO 2 ) to produce sugars. H 2 O enters through the roots H 2 O enters through the roots CO 2 enters through the leaves stomata. CO 2 enters through the leaves stomata. Small openings on the underside of the leaves. Small openings on the underside of the leaves.

What it looks like

The Equation 6 CO H 2 OC 6 H 12 O O 2 6 CO H 2 OC 6 H 12 O O 2 Carbon dioxide Water Glucose Oxygen LIGHT ENERGY

Sunlight Nearly all living things obtain energy either directly or indirectly from the energy of sunlight captured during photosynthesis. Nearly all living things obtain energy either directly or indirectly from the energy of sunlight captured during photosynthesis.

Planting Methods There are two ways to plant: There are two ways to plant: Transplanting by using a pot Transplanting by using a pot Direct Sow Direct Sow

Direct Sow – placing a seed directly into the ground in your garden. Direct Sow – placing a seed directly into the ground in your garden. Transplanting – placing a seed into a pot with potting soil or starting soil. Transplanting – placing a seed into a pot with potting soil or starting soil.

Germination Germination – the time it takes for a seed to sprout out of the ground becoming a plant. Germination – the time it takes for a seed to sprout out of the ground becoming a plant.

Planting Seeds Video Video Video