Year 3 Science The life cycle of a flowering plant: check-up and practice test questions

Method. Think about the stage after a seed starts to grow.

1. Think about germination. After germination, the young plant is called a seedling.
   seedling
2. Write the answer.
   seedling

Check. A seedling grows from a seed that has germinated. ✓

Method. Think about the coloured part of the flower.

1. Think about the colour. The bright, coloured part of a flower is the petals.
   petals
2. Write the answer.
   petals

Check. Petals help to attract insects. ✓

Method. Think about the word for moving pollen.

1. Read the definition. Moving pollen from the male part to the female part is pollination.
   pollination
2. Write the answer.
   pollination

Check. Pollination moves pollen between flowers. ✓

Method. Think about the fruit that holds the seeds.

1. Read the chapter. The fruit of a bean plant is a pod.
   pod
2. Write the answer.
   pod

Check. A bean pod holds the seeds. ✓

Method. Think about what carries a parachute seed.

1. Read the table. A seed with a fluffy parachute is carried by the breeze.
   breeze
2. Name the method. The method is the wind.
   wind
3. Write the answer.
   wind

Check. The dandelion is dispersed by the wind. ✓

Method. Think about what helps a seed to start growing.

1. Think about water. A seed needs water to soak in.
   water
2. Think about warmth and air. A seed also needs a suitable temperature and air.
   warmth and air
3. Write the answer.
   Accept any two of: water, warmth, air.

Check. Water, a suitable temperature and air are needed. ✓

Method. Start with the stage that comes first.

1. Start with pollination. Pollination comes first, after flowering.
   pollination first
2. Next, seed formation. Seeds form inside the fruit after pollination.
   seed formation second
3. Last, seed dispersal. The seeds are dispersed at the end of this part of the cycle.
   seed dispersal last
4. Write the answer.
   pollination, seed formation, seed dispersal

Check. Pollination, then seed formation, then seed dispersal. ✓

Method. Take the smaller number away from the bigger number.

1. Read the two numbers. Dish A had 9 seeds germinate, and dish C had 3.
   9 and 3
2. Find the difference. The difference is how many more seeds germinated in dish A.
   9 − 3 = 6
3. Write the answer.
   6

Check. 3 + 6 = 9, so the answer is right. ✓

Method. Think about what the seed uses at first.

1. Think about the stored food. At first the seed uses the stored food inside it, not the soil.
   stored food
2. Decide. So a seed does not need soil to germinate, and Sam is not right.
   no
3. Write the answer.
   no

Check. The soil is needed later, for nutrients. ✓

Method. Think about what crowded plants have to share.

1. Think about crowding. Seeds that fall next to the parent share its light, water and nutrients.
   share
2. Give the reason. Dispersed seeds have room, light and water of their own.
   own room
3. Write the answer.
   Accept any sentence that says spread-out seeds do not crowd the parent, so each new plant has room, light and water.

Check. Dispersal helps each new plant to grow well. ✓

Method. Find pollination, and follow the next stage.

1. Find pollination. Pollination is followed by seed formation.
   seed formation
2. Write the answer.
   seed formation

Check. Seeds form after pollination. ✓

Method. Find the panel with water in it.

1. Find the water panel. The panel with water in it shows a coconut floating.
   coconut floats
2. Name the seed. So the seed carried by water is the coconut.
   coconut
3. Write the answer.
   coconut

Check. A coconut floats, so it is dispersed by water. ✓

Method. Think about what carries the pollen.

1. Read the description. A bee is an insect that carries the pollen.
   bee
2. Name the type. So this is insect pollination.
   insect
3. Write the answer.
   insect

Check. Insects carry pollen when they feed on nectar. ✓

Method. Look at the labels on the picture.

1. Find the labels. The labels show the seed coat, the stored food and the tiny young plant.
   three labels
2. Name two. Two of these parts are the seed coat and the stored food.
   seed coat and stored food
3. Write the answer.
   seed coat and stored food

Check. The seed coat protects the seed, and the stored food helps it to start growing. ✓

Method. Think about what a seed needs first.

1. Think about water. A seed needs water to soak in and start to grow.
   water
2. Give the reason. Dish B was dry, so the seeds could not soak in water.
   dry
3. Write the answer.
   Accept any sentence that says dish B was dry, so the seeds had no water to soak in and start to grow.

Check. Water is one of the three things a seed needs. ✓

Method. Find the difference, then compare the two dishes.

1. Find the difference. 9 − 3 = 6, so dish A had 6 more seeds germinate.
   6 more
2. Compare the dishes. Both dishes were damp, but dish A was warm and dish C was cold.
   temperature
3. Write the answer.
   6; the temperature was different

Check. 3 + 6 = 9, so the answer is right. ✓

Method. Start with the seed, and follow the stages in order.

1. Start with the seed. A seed is the first stage.
   seed
2. Then the other stages. The seed germinates, then becomes a seedling, then a young plant.
   germination, seedling, young plant
3. Write the answer.
   seed, germination, seedling, young plant

Check. Each stage follows the one before it. ✓

Method. Think about what the bee gets from the flower.

1. Name the liquid. The sweet liquid made by a flower is nectar.
   nectar
2. Give the reason. The bee visits to feed on nectar, and pollen sticks to its body.
   feed on nectar
3. Write the answer.
   nectar. Accept any answer that says the bee feeds on nectar, and gets pollen on its body.

Check. Insects feed on nectar, and carry pollen to the next flower. ✓

Method. Follow the pollen from one flower to the next.

1. Follow the pollen. The bee carries pollen from the male part of one flower.
   male part
2. Name the place. The pollen reaches the female part of another flower.
   female part
3. Say where the seeds form. After pollination, seeds form inside the female part, which grows into the fruit.
   inside the fruit
4. Write the answer.
   Accept any answer that says the bee carries pollen from the male part of one flower to the female part of another, and seeds form in the female part.

Check. Pollination must happen before seeds form. ✓

Method. Think about what a fair test changes and keeps the same.

1. Find the thing that changes. The amount of water changes between the dishes.
   water changes
2. Find two things that stay the same. The type of seed, the temperature and the number of seeds stay the same.
   seed, temperature, number
3. Put the parts together. One thing changes, and the other things are kept the same.
   one changes
4. Write the answer.
   The water changes. Accept any two things kept the same, such as the type of seed, the temperature, the number of seeds or the dish.

Check. Only the water changes in a fair test. ✓