Science Semester Test Review Question Preview (ID: 42664)


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The smallest unit of ecological organization is a single
a) population
b) community
c) organism
d) ecosystem

The function of the atria is to
a) pump blood to the lungs
b) pump blood to the body
c) receive blood that comes into the heart
d) deliver oxygen to body tissues

Which of the following is NOT a function of the digestive system?
a) obtaining oxygen
b) eliminating undigested wastes from the body
c) breaking down food into molecules that the body can use
d) absorbing food molecules into the blood

If a kestrel eats a mouse that eats grass, the kestrel is a
a) producer
b) second-level consumer
c) first-level consumer
d) decomposer

Needed substances are carried to the body cells by
a) enzymes
b) blood
c) water
d) food

The place where an organism lives that provides the things the organism needs is called its
a) habitat
b) population
c) species
d) community

According to the Food Guide Pyramid, which group should be eaten in very limited amounts?
a) bread, cereal, rice and pasta
b) vegetables
c) milk, yogurt, and cheese
d) fats, oils and sweets

Consumers that can eat both plants and animals are called
a) omnivores
b) herbivores
c) carnivores
d) scavengers

Which of the following is a biotic factor in the prairie ecosystem?
a) water
b) sunlight
c) soil
d) grass

The many overlapping food chains in an ecosystem make up a(n)
a) food web
b) niche
c) energy pyramid
d) feeding level

What substance must be present in the stomach for pepsin to work best?
a) hydrochloric acid
b) mucus
c) saliva
d) water

Blood vessels that carry blood away from the heart are called
a) veins
b) arteries
c) cappilaries
d) lymphatic vessels

Which of the following is an example of a population?
a) the cats and dogs in your neighborhood
b) the bushes and grass in a park
c) the rocks in a rock collection
d) the gray wolves in a forest

A diagram that shows the amount of energy that moves from one feeding level to another in a food web is called
a) food chain
b) energy pyramid
c) ecosystem
d) niche

The Food Guide Pyramid indicates how many servings from each food group should be eaten
a) at each meal
b) each day
c) each week
d) each month

In which vessels are materials exchanged between the blood and the body cells
a) veins
b) arteries
c) capillaries
d) lymphatic vessels

Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is called
a) direct observation
b) mark and recapture
c) population density
d) sampling

In which process do molecules of liquid water absorb energy and change into the gas state?
a) condensation
b) precipitation
c) evaporation
d) recycling

A calorie is a unit used to measure
a) vitamins
b) minerals
c) temerature
d) energy

What causes blood pressure
a) the force with which the ventricles contract
b) the rate at which blood flows through the heart
c) the speed at which oxygen is returned to the blood in the lungs
d) the strength of the muscles in the walls of the capillaries

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