WorksheetsScience Unit 7- Investigating Ecosystems (RRE 3rd Grade)
Total questions: 25
Worksheet time: 2hrs 5mins
If you are handling amphibians, reptiles and other animals during a lab experiment, you should wear _____________.
goggles, gloves and long sleeves
googles and earplugs
a lab coat and tennis shoes
you do not have to worry about wearing any safety items
A _______ is a tool you can use to measure mass or weight.
beaker
scales
graduated cylinder
hand lens
Frank has a pet snake. The best temperature for the terrarium needs to be 20 degrees Celsius. How much warmer does the temperature need to be for Frank's snake to be healthy?
10 degrees Celsius
10 degrees Fahrenheit
20 degrees Celsius
20 degrees Fahrenheit
In a certain ecosystem, wolves eat rabbits, and rabbits eat berries. During a year with little rain, there are fewer berries for the rabbits to eat. That year the number of wolves in the ecosystem decreased. Which is the BEST expanation for why this happened?
The wolves ate sick rabbits and died.
There were less rabbits for the wolves to eat.
There were not enough berries for the wolves.
The wolves ate berries and leaves.
What would happen if you removed all the frogs in a pond ecosystem?
There would be a decrease in the amount of insects that the frogs eat.
The fish that eats frogs may not have enough food.
There would be no change in the ecosystem.
An advertisement hanging in the window of a store states, "We will supply everything your dog needs to grow healthy and strong." What product(s) does the store MOST LIKELY sell?
dog food
dog toys
dog medicine
dog food, toys, medicine, and other dog products
A scientist learns that an important medicine can be make from the bark of some trees. This discovery will MOST LIKELY change the way people think about...
how plants make their own food.
how old a tree can be.
why we need to conserve and protect trees.
why we need to conserve water.
Which of the following is BEST observed with a hand lens?
A deer running though a field
A fish swimming in a pond
A spider spinning a web
A bird perched high in a tree
Which of the following are examples of a nonliving objects in an ecosystem?
rocks, water, and air
grass, trees, and other plants
insects, fish, and mammals
Snapping turtles, ducks, mosquitoes, crawfish, and dragonflies are MOST LIKELY found in which ecosystem?
the ocean
a mud puddle
a fresh water pond
a desert
Thousands of different plants live in desert ecosystems around the world. Which of the following do ALL desert plants have in common?
They all have prickles of thorns.
They are all poisonous.
They all need a lot of water.
They can all live without much water.
Which individual in this food chain is a producer?
the seaweed
the sandhopper
the crab
the seagull
What is the beginning of most food chains?
plants
grass
water
sunlight
Which event is MOST LIKELY to cause the numbers of animals living in a forest in increase?
a drought
a forest fire
clearing the land to build a city
good rainfall
Africa experienced a very bad drought. How will the wild animals MOST LIKELY be affected in this region?
Some animals may perish and some animals may move to another area to survive.
All animals will thrive.
All animals with perish.
All animals will move to another area.
Can an animal be both a predator and prey?
yes
no
Which living thing is a predator?
a tree
a caterpillar
a rose
a lion
Skunks eat insects, bird eggs and fruit. Which group do skunks belong to?
producer
carnivore
omnivore
herbivore
Think about an ocean ecosystem. Why do you think there are no plants in the midnight zone of the ocean?
There are plants in the midnight zone, but it is just too dark to see the plants.
There is no such thing as a midnight zone int eh ocean
NO sunlight can reach the midnight zone and plants need sunlight to make their food.
What covers most of the Earth?
freshwater
salt water
deserts
rainforests
Plants and animals in an ecosystem depend on each other for survival.
true
false
What is missing form this diagram of a food chain?
another producer
the sun
nothing is missing
a predator
How does the snake get its energy in this food chain?
the frog eats the grass
the frog eats the snake
the snake eats the frog
the snake makes its own food from the sun
What would happen to the hawk population if the frogs dies or moved out of the area?
The hawk population may be reduced because they do not have enough food.
Nothing would happen to the hawk population because they don't eat frogs.
Which living organisms are decomposers?
snails, earthworms, bacteria, and fungi
trees plants and seaweed
lions, eagles, and sharks
cows, horses, and deer
