Final Review Sheet
(Unit 3 and 4)
Write the letter of the best choice
______1. Which organ removes waste from the blood, controls the blood’s salt level, and helps
conserve water?
bladder
kidneys
small intestine
liver
______2.
Through which organ system does food get to your cells?
the muscular system
the circulatory system
the excretory system
the skeletal system
______3.
Where is urine stored prior to urination?
bladder
large intestine
kidneys
stomach
______4. Robert has grown taller again and needs larger clothes. Which gland produced the
growth hormone that caused this change?
adrenal
pituitary
pancreas
thyroid
______5. The organ shown below, identified with an arrow, is a digestive
organ.
What happens when food reaches this organ?
Acidic juices mix with the food.
Food is stored, but no digestion occurs.
The food is completely digested and absorbed into the bloodstream.
The food is moved into the small intestine within two or three minutes.
______6. After playing soccer in the sun for one hour, Ana is hot. Her skin produces sweat, which
contains water and salt. How does Ana’s skin keep her body cool?
Salt traps heat near the skin.
Water keeps skin from getting too dry.
Waste salt is removed from the body in sweat.
Evaporation of water removes heat from the body.
______7. Mrs. Kim’s class was identifying different species of plants. Which of the following best
describes a species?
the next more specific classification following an order
a group in which organisms of different kinds are closely related
a unique kind of organism
another name for a family or genus
______8.
Tuyen’s class was studying vertebrates. What are vertebrates?
animals with body parts in segments
animals with spiny skin
animals with backbones
animals without backbones
______9. Scientists organize living things into a number of different levels of classification. As you
continue down the levels of classification, which of the following is true?
Each level refers to a unique kind of organism.
The members of each classification level have more and more differences.
The organisms are grouped more and more by their behavior.
The organisms are more and more closely related to each other.
______10. Emma’s class was studying vertebrates. Which of the following are examples of
vertebrates?
ferns, conifers, mosses
brittle stars, sea stars, basket stars
camels, falcons, frogs
crabs, grasshoppers, jellyfish
______11. Which of the following is a list of invertebrate groups?
amphibians, fish, reptiles
sloths, spiders, sea urchins
frogs, salamanders, sea turtles
mollusks, arthropods, echinoderms
______12. David wrapped five thermometers in strips of cloth . He dipped four into different liquids.
He left the fifth dry. He set them in the shade for five minutes. The table below shows the
temperature he recorded for each thermometer.
Alcohol
◦
72 F
Mineral oil
◦
82 F
Salt water
◦
78 F
water
◦
78 F
dry
◦
83 F
Whish liquid evaporates fastest?
water
salt water
alcohol
mineral water
______13. In David’s experiment, why did he leave one thermometer dry?
David had five thermometers but only four liquids, so he left one thermometer dry.
David wanted to know what the temperature was in the room where he prepared his
experiment.
The dry thermometer is the variable to which he could compare the others.
The dry thermometer is the control to which he could compare the others.
______14. Urine is a product of the urinary system. What makes up normal human urine?
Oxygen
Nutrients
Water and waste products
All the fluids a person drinks
______15. Patrick wants to classify an organism. The organism can be seen without a microscope.
Its cells have cell walls but no chloroplasts. The organism gets food by breaking down dead
organisms. Which kingdom does this organism likely belong to?
animal
plant
fungi
protist
______16. Animals can be classified as vertebrates or invertebrates. Which structure must be
present in order for an animal to be classified as a vertebrate?
a tail
a wing
a brain
a backbone
______17. Alan is classifying organisms into different kingdoms. When he observes one group of
organisms under a microscope, he sees that they are each made up of one cell with no cell
wall. Which kingdom do these organisms most likely belong to?
plant kingdom
fungi kingdom
animal kingdom
bacteria kingdom