Which organism best replaces the ??? in the food web shown above?
The rabbit population in a certain ecosystem sometimes decreases dramatically.
Question 2
2.
One possible explanation for this decrease is _____.
Question 3
3.
Mark X next to the statements that describe how marine and terrestrial ecosystems are alike.
Question 4
4.
What is the role played by redworms in an ecosystem? Mark X next to each sentence that is true.
Question 5
5.
Which system found in animals is similar to the vascular system in plants?
Question 6
6.
Many organisms have features that attract the attention of other organisms. Mark X next to each phrase that describes why these features are important.
Question 7
7.
Match the structures to their functions in the body. Drag an organ from the left side to its definition on the right side.
Heart
Kidney
Lung
Stomach
Capillary
Artery
Blood
Small Intestine
To reach every cell in the body
To pass nutrients from digested food into the blood
To filter waste products from the blood
To carry blood from the heart to the body
To exchange gases with the atmosphere
To carry oxygen, food, and nutrients through vessels
To pump blood throughout the body
To break down food with digestive juices and muscles
Question 8
8.
Mark X next to each function of the central nervous system.
Two students were sitting on a park bench at dusk, eating snacks. A mosquito landed on student A’s arm, and she slapped it. When she did that, she spilled a drink into student B’s lap, causing him to jump up.
Question 9
9.
What was the stimulus for student A?
Question 10
10.
What was the stimulus for student B
Question 11
11.
What was the response for student A
Question 12
12.
What was the response for student B?
Question 13
13.
Mark X next to the two words that correctly complete this sentence. “Plants get the materials they need for growth mainly from _____ and _____.”
Question 14
14.
What can communities do to improve the environment and help monarch butterflies survive?
Question 15
15.
Move instinct, learned, or reflex over to the correct situations:
Instinct
Learned
Reflex
Riding a skateboard
Bears hibernating in winter
Using a straw to drink
Using tools to gather food
Blinking when something comes toward you
Squirrels gathering acorns
Study the tables below that show the results of a stimulus/response investigation. The object of the investigation is to see how quickly students can move their hands out of the way of a falling cup.
Question 16
16.
Is this student right-handed or left-handed?
Look at the list of organisms in the box.
Question 17
17.
1. Draw a food web to show how they interact. (In this ecosystem, ants and gophers both eat grass; lizards eat ants, and hawks eat lizards and gophers.) 2. Label each of the organisms in your food web to tell if they are producers, consumers, or decomposers.
Question 18
18.
Two students were talking. Student A was examining the lettuce leaves in a salad he was eating. He said, “Did you know that I am eating energy from the Sun?” Student B was eating a hamburger. She said, “Did you know that I am eating energy that came from the Sun, too?” Do you agree with these two students? Explain in words or with a drawing why you agree or disagree with each student.
