What do we call plants that make their own food?

What do we call animals that eat other living things?

Which thing does a plant use to make its own food?

A food chain starts with the Sun or a ___.

In this chain, a mouse eats grass and an owl eats the mouse. What does the mouse eat?

In this chain, a rabbit eats grass and a fox eats the rabbit. What eats the rabbit?

A bird eats an insect that ate a leaf. What comes first?

Grass, a rabbit, and a fox make a chain. Which is the producer?

A snake eats a mouse, so the snake is a ___.

Animals can make their own food just like plants do.

Animals cannot make their own food, so they must do what?

What do we draw between living things to show a food chain?

On which day was the most rain recorded?

How many days on the chart were sunny?

Which day was warmer, Monday or Thursday?

On which day was the wind strongest?

How much snow fell on Wednesday?

On which day was the coolest temperature recorded?

Which day had more rain, Tuesday or Friday?

What was the weather on the warmest day?

How many degrees warmer was Tuesday than Wednesday?

Which day was windier, Monday or Wednesday?

How much rain fell on Friday?

On which day was no rain recorded?

Which body part do you use to see?

Which body part do you use to hear?

Which body part do you use to smell?

Which body part do you use to taste?

Which sense do you use to feel a soft cat?

How many senses do people have?

Which sense do you use when a dog is barking?

Which sense do you use when you sniff a flower?

Which sense do you use to read a book?

Which sense tells you if something is hot or cold?

Which body part helps you touch and feel things?

Which sense tells you if an apple is sweet or sour?

What comes out of a butterfly egg?

What does a caterpillar turn into next?

What comes out of a chrysalis?

Which stage comes before the caterpillar?

Which stage lays butterfly eggs?

What hatches out of frog eggs?

What does a tadpole grow into next?

What does a froglet become when it is grown?

Which frog stage comes before the froglet?

What comes out of a hen's egg?

What does a chick grow into?

Which stage comes before the chick?

For this animal, which stage comes first of all?

Which stage comes after these eggs?

Which stage comes just before this adult?

Which stage comes after this egg?

A class measures a pond all year and finds the water temperature range stays between 12 C and 15 C. What kind of factor of the pond ecosystem is this temperature range?

On a forest floor, shelf mushrooms grow across a fallen tree trunk and slowly break the wood down. What kind of factor of the forest ecosystem are the mushrooms?

A desert survey records four things: sandy soil, a night air temperature of 8 C, kangaroo rats, and yearly rainfall of 6 cm. Which recorded item is a biotic factor?

A grassland plot is described as holding tall grasses, grasshoppers, hawks, and clay-rich soil. Which described part of the plot is an abiotic factor?

Waves throw salt spray onto the bare rocks of a coast, and only a few plants can grow where the spray lands. What kind of factor of this coastal ecosystem is the salt spray?

Sunlight falls across a pond each day, and the pond plants need it to grow. What kind of factor is sunlight in this pond ecosystem?

Two young maple trees grow one meter apart in a forest gap. Both spread branches toward the same patch of sunlight, and the shaded tree grows much more slowly. What interaction does this describe?

In a dry grassland summer, a bison herd and a prairie dog colony feed on the same short grasses, and the grass is running out. What resource are these two groups competing for?

Two creosote bushes in a desert spread wide, shallow roots through the same patch of ground. Rain falls only twice a year, and the smaller bush drops many leaves. What resource are the bushes competing for?

Lily pads spread until they cover most of a pond's surface. Under them, the submerged water plants grow thin and pale. What resource are these plants competing for?

In one forest, gray squirrels and chipmunks both eat acorns. One autumn the oak trees produce very few acorns. What is the most likely result for these animals?

A pond study counts 40 bullfrogs, all of the same species, living in the same pond at the same time. What term names this group of 40 bullfrogs?

A marsh survey lists every living thing in the marsh together: cattails, frogs, herons, insects and bacteria. It does not include the water, mud or air. What term names this group?

The soil in one grassland is thin and low in nutrients, so the grasses growing there stay short and thin all season. What kind of factor is limiting the grasses?

Soil composition is an abiotic factor of a desert ecosystem.

Two plants growing side by side in the same small pot both draw water from the same soil, and one begins to wilt. This is an example of competition.

On a coastal mudflat, sandpipers and plovers probe the same mud for the same small worms as the tide falls. What interaction does this describe?

A red-tailed hawk dives from a tree branch and catches a field mouse to eat. What interaction does this describe between the hawk and the mouse?

On a coastal dune, beach grass sends roots through the loose sand and helps hold the dune in place. Which part of this description is a biotic factor?

Two hawk populations hunt over the same grassland and both catch the same field mice, which are becoming harder to find. What term names this interaction between the two hawk populations?

A stream survey measures the amount of oxygen dissolved in the water and finds it drops on warm afternoons. What kind of factor of the stream ecosystem is the dissolved oxygen?

On an exposed ridge, steady wind bends the growing trees and dries the soil. What kind of factor of that ridge ecosystem is the wind?

A cave survey lists four things: bats roosting on the ceiling, a steady air temperature of 11 C, dripping water, and bare limestone walls. Which listed item is a biotic factor?

A tide pool is described as holding barnacles, seaweed, cold seawater, and smooth granite rock. Which described part of the pool is an abiotic factor?

Thick mats of moss cover the shaded north side of boulders in a damp forest. What kind of factor of that forest ecosystem is the moss?

A mountain study records that snow lies on the ground for five months of the year, keeping the soil frozen. What kind of factor is the length of snow cover?

Bacteria in the soil of a meadow break down dead plant material and release nutrients back into the ground. What kind of factor of the meadow are those bacteria?

A lake study reports that the water stays between 4 C and 21 C across the year. What kind of factor of the lake ecosystem is this temperature range?

A saguaro cactus stores water in its thick stem through months without rain. Which abiotic factor is the cactus most clearly depending on when rain does fall?

Trout in a mountain stream need oxygen from the water to survive, and warm still water holds less of it. Which factor are the trout depending on here?

Two barn owl pairs hunt over the same small field, and both need holes in old trees to nest in. Only three suitable holes exist. What are the two pairs competing for?

In a forest gap, several tree seedlings sprout under one opening in the canopy, and only the tallest keeps growing quickly. What resource are the seedlings competing for?

A pond fills with duckweed that covers the surface. A student says the duckweed is an abiotic factor because it is not an animal. What is wrong with that reasoning?

Two colonies of ground squirrels dig on the same hillside and both feed on the seeds of the same grasses. In a poor seed year, what is the most likely result?

A drought drops a marsh's water level for two summers in a row. What is the most likely effect on the marsh's frog population, and why?

A row of young trees is planted along a sunny stream, and within a few years they shade the water. What is the most likely effect on the algae growing in that stream?

One winter is far colder than usual in a valley, and the ground stays frozen weeks longer. What is the most likely effect on the valley's insect population that spring?

A stream is dammed and the flow below the dam drops sharply for a year. What is the most likely effect on the cattails growing along the lower banks?

A fallen oak leaf lies brown and dry on the forest floor. A student must classify it as a biotic or an abiotic factor. Which classification fits, and why?

An empty snail shell found on a beach is part of the beach ecosystem. How should it be classified?