7th grade Science Semester Review

1. Which one of these is an unsafe practice?

• Testing a substance by tasting it

• Watering a plant without wearing gloves

• Using a glass rod to stir liquid in a glass beaker

• Detecting an odor by moving air toward you with your hand

2. 2.  Jessica and Sarah are practicing measurement. They are measuring different amounts of dyed water using beakers, graduated cylinders, and Erlenmeyer flasks. Sarah accidently knocks over a graduated cylinder. What should Sarah do?                                                

• Quickly pick up the broken glass and place it in the broken glass receptacle.

• Quickly pick up the broken glass and place it in the trash can.

• Let her teacher know and throw away the broken glass in the trash can.

• Notify teacher and teacher will throw away the broken glass in the trash.

3.  Which of the following is the first step in the scientific method? 7.03D (S) DOK2

• Make an observation

• Form a hypothesis

• Test the prediction

• Form a conclusion

4. Students in Mrs. Thompson's class are getting ready to dissect a bullfrog. Which of the following lab supplies should be used to ensure that everyone's hands are protected from the chemicals that the bullfrogs are preserved in?

• apron
• safety goggles
• gloves
• test tubes

5. Which body system performs the same role as the wood in the house? 7.12B (S) DOK 2

• Circulatory

• Nervous

• Respiratory

• Skeletal

6. Students view a cell under a microscope and notice that there is NO nucleus. The students conclude they are observing-

• Bread yeast

• onion skin

• pollen grains

• bacteria

7. At what level would the human heart be classified in the structural organization chart?

• 1

• 2

• 3

• 4

11. 8. Which term belongs in the box that describes this system?

• Endocrine

• Muscular

• Respiratory

• Circulatory

9. 9. Which organelle stores DNA and acts as the control center for the cell?

• Mitochondria

• Ribosomes

• Nucleus

• None of the above

10. 10. The main function of this human body system is to-

• F

• G

• H

• J