Grade 3
Grade 3 T/F
Grade 4
Grade 4 T/F
Grade 4 T/F
100
What are the 4 main parts of a flower?
Bonus: what do they do?
Sepals - small green leaves, protect bud
Petals - attract birds and insects to the flower
Pistil - seeds grow in the thick lower part of the pistil
Stamens - pollen is made in the top of the stamen
100
Flowers have more than one pistil.
False.
100
A. Energy B. Bicycle C. Gear D. Pulley
_____ A simple machine that has teeth around its edge.
_____ A simple machine that uses a wheel that has a groove in it.
_____ All machines need this to work.
_____ A machine that has 2 sets of gears.
__C__ A simple machine that has teeth around its edge. = Gear
__D__ A simple machine that uses a wheel that has a groove in it. = Pulley
__A__ All machines need this to work. = Energy
__B__ A machine that has 2 sets of gears. = Bicycle
100
Machines make work easier.
True.
100
Pulleys can be found in our everyday life.
True.
200
Pollen is a powder that helps make seeds. It needs to get from the stamen to the pistil.
What are 2 ways pollen can travel?
Bonus: what is this process called?
Pollen can travel by wind, or insects.
The process is called pollination.
200
Brightly coloured petals can make insects want to come to the flower.
True.
200
Describe 2 ways you can save energy.
Answers will vary.
Walk, cycle or travel by bus rather than car.
Use the stairs instead of an elevator.
Use energy efficient washing machine, hang clothes to dry instead of using the dryer.
Walk, cycle or travel by bus rather than car.
Use the stairs instead of an elevator.
Use energy efficient washing machine, hang clothes to dry instead of using the dryer.
200
We do not use gears in our everyday life.
False.
200
Gears can be used to change speed of movement.
True.
300
Think about how plants, animals, and people get energy.
Write the following living things in order of the food chain:
cow grass sun boy
300
All food contains energy.
True
300
Why is saving energy important?
Answers will vary.
Saving energy helps the environment (less pollution) and it can help us save money.300
A movable pulley changes position and is not attached to a structure.
True.
300
A fixed pulley does not stay in one place.
False.
400
Put the steps of the Life Cycle of a Plant in order
* a root begins to grow down into the soil
* a seeds gets water, and a tiny plant pushes out of the seed
* the sprout's stem grows taller and leaves appear
* each flower turns into a fruit that has seeds inside
* the plant grows bigger and more leaves appear
_2_ a root begins to grow...
_1_ a seed gets water...
_3_ the sprout's stem grows...
_5_ each flower turns into a fruit...
_4_ the plant grows bigger...
400
One way animals help seeds travel is by burr.
Bonus: can you think of a different way that animals help seeds travel?
True.
A burr is a seed that is covered by hooks or spikes which sticks to an animal's fur.
Bonus: manure, hiding places
400
In this gear train, a small gear makes a larger gear turn. Will the larger gear turn faster or slower? Why?
The larger gear will turn slower than the smaller gear because it has more teeth.
One tooth on the large gear will move one tooth on the small gear. There are 16 teeth on the large gear, and only 8 teeth on the small. So, when the large gear has made one-half of a turn, the small gear will make a full turn.
400
Windmills were once used to grind grain.
True.
400
Both sets (2) of gears on a bicycle are connected to the pedals.
False.
The front gears connect to the pedals.
The front gears connect to the pedals.
The back gears connect to the rear wheel.
500
Describe 3 ways that plants and animals help each other.
Answers will vary.
Plants provide food/energy for animals.
Animals help seeds travel to different places, allowing plants to grow in different places.
Plants release oxygen into the air, which animals need to breathe (animals breathe out carbon dioxide, which plants need)
500
Humans require energy to grow.
True.
Bonus: can you think of other things that people use energy to do?
500
What are 2 advantages of using a compound pulley?
**A compound pulley is made up of two or more pulleys
Answers will vary.
The load will be easier to lift. They need less force to lift heavy objects. They can change the direction of objects being lifted. Compound pulleys have qualities of both fixed and moveable pulleys.500
The pinion is a worm gear.
False. The pinion is a spur gear.
Spur gears have several teeth, while worm gears only have one tooth.
500
Some buckles use a rack and pinion.
True.