7th Grade Life Science

Sample Questions from State CRT

 

District Objective 7.5.A (ABACUS 01-SC07-60; PASS CS8.3.1)

By classifying organisms, biologists consider details of internal and external structure.

 

Process Standard 2.      Classify

Objective 1.      Using observable properties, place an object, organism, and/or event into a classification system (e.g., dichotomous keys).

 


A common blue violet is shown at right. Botanists identify violets by their flowers and leaves.  Which plant shown below is another type of violet?

 

 

 


A                                         B                             C                             D

 

 

 

 

 

 

 

Process Standard 1.                               Observe and measure

Objective 2. Use appropriate tools (e.g., metric ruler, graduated cylinder, thermometer, balances, spring scales, stopwatches) when measuring objects, organisms, and/or events.

 

Students were classifying leaves by measuring their length and studying their shape and pattern of their veins. Which pair of measuring tools would be most appropriate for this activity?

 

 

 


A                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    C

 

 

 

 

 


B                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    D

 

 

 

District Objective 7.5.A (ABACUS 01-SC07-60; PASS CS8.3.1)

By classifying organisms, biologists consider details of internal and external structure.

 

Process Standard 2.                                           Classify

Objective 1. Using observable properties, place an object, organism, and/or event into a classification system (e.g., dichotomous keys).

 

1. Tail.......................................................... Go to 2

1. No Tail..................................................... Go to 3

2. Spotted pattern on skin............. tiger salamander

2. No spotted pattern on skin..... dusky salamander

3. Bumpy skin..................................... western toad

3. Smooth skin..................................... leopard frog
 
Characteristics of Amphibians

 

 

 

 

 

 

 

 

 

 

 

According to the key, which of these animals is a tiger salamander?

A

 

 

 

 

 

District Objective 7.5.B (ABACUS 01-SC07-65; PASS CS8.3.2)

Organisms have a great variety of internal and external structures that enable them to survive in a specific habitat such as echolocation of bats, seed dispersal methods, etc.

 

Process Standard 3.      Experiment

Objective 2.      Evaluate the design of a scientific investigation.

 

Jeremy conducted an experiment that compared the effects of different sounds on the growth of bean plants. He planted bean seeds of the same type and size in three containers using the same type of soil in each container. He placed the containers in the locations shown.

 

 

 

 

 

 

 


Jeremy gave each plant the same amount of water at the same time each day. After two weeks, Jeremy observed that the plant in the living room was the largest and had the most leaves. Jeremy concluded that bean plants grow the fastest when exposed to television sounds. Which is the greatest error that Jeremy made in his experimental design?

 

A       Jeremy did not control other variables that might affect plant growth.

B       Jeremy did not control for the variables of soil type or amount of water.

C       Jeremy did not plant the beans from seeds.

D       Jeremy did not use enough different types of music.

 

 

Process Standard 4.                         Interpret and communicate

Objective 2.            Interpret data tables, line, bar, trend and/or circle graphs.

 

 

 

 


 

 

 

 

 

 

The graph shows the months of flowering for some plants. Which number will complete the chart?

 

A                                                                                    3

B                                                                                    4

C                                                                                    5

D                                                                                    6