Study Guide - Science/Chapter 2
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What is photosynthesis?
The process in which plants make their own food.
What is chlorophyll?
The green material in plants that captures energy from sunlight for photosynthesis.
What is a multi-celled organism?
An organism that is made of many cells.
Name three characteristics of plants.
All plants need sunlight and water. They also need carbon dioxide from the air and nutrients from the soil.
In what part of the plant cell does photosynthesis occur?
Photosynthesis begins when a plant's roots take in water and nutrients from the soil.
Most plant parts that a green contain chlorophyll. What might you conclude about a plant part that is not green?
It does not contain chlorophyll.
Why do larger plants have woody instead of flexible stems?
They hold up larger plants and provide better protection to the plants.
What are two jobs of the roots?
One job is to keep the plant in the ground.
Another is they take in water and minerals from the soil.
How do stems help a plant survive?
They hold up the leaves, which helps them catch sunlight.
They also carry water, minerals, and food through the plant.
What is a sepal?
It is one of several leaf-life parts that cover and protect the flower bud.
What is the pistil?
A female structure in plants that produces egg cells.
What is the stamen?
The male structure in plants that makes pollen.
What is an ovary?
It is the thick bottom part of the pistil where the egg cells are stored.
What is fertilization?
It is the process by which an egg cell and a sperm cell combine.
What are the four main parts of a flower?
The four main parts of a flower are the petals, the sepals, the pistil and the stamens.
What part of the flower makes egg cells?
The pistil is in the center of the flower, the female part of the flower and it makes egg cells.
What are some ways that pollen moves from stamen to pistil?
The wind helps pollination happen by carrying the a stamen to a pistil.
Animals can also help pollination by transferiing pollen from the body from one plant to another.
What does dormant mean?
It means a state of rest.
What does a seed need to germinate?
A seed needs oxygen, water, sunlight, and temperature to grow (germinate).
Why is it important that seeds are scattered away from their parent plant?
They would not have enough space or resources to grow.
The parent leaves would let only a little sunlight reach the seeds.
The parent tree's roots wuld suck up most of the nutrients from the soil.
Describe how spores are different from seeds.
A seed holds a small plant and it gives the plant energy to grow.
A spore is simpler than a seed and it is made of one cell. This means it has very little stored food.
What are some ways that plants reproduce without seeds?
Some plants grow from stems, roots, or leaves.
Othe plants grow from bulbs.
Some plants grow on the parent plant.
Some plants grow from the stems of other plants.
Explain why death is a part of the life cycle of a plant.
Just like in humans, a plant has life cycle.
Plants are seed; they grow into young plants; they grow into adult plants; they become parent plants; make more flowers and seeds; and then die.
It death completes the life cycle.
A healthy plant has water on the underside of several of its leaves.
What can you conclude is the source of the water?
The source of the water is the soil and the vapors.
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