Review Sheet for 7th grade 3 Week DCA
1. How do we carry out a scientific experiment?
a. _____________________
b. _____________________
c. _____________________
d. _____________________
e. _____________________
f. _____________________
2. Why do we use scientific inquiry?
__________________________________________________________
3. What is an independent variable? ______________________________
4. What is a dependent variable? _________________________________
5. What is a constant? __________________________________________
6. Problem: Which type of fertilizer helps plants grow?
Independent: _____________________ Dependent: _______________
Constants: __________________________________________________
7. Problem: Which type of food do dogs like the best?
Independent: _____________________ Dependent: ________________
Constants: __________________________________________________
8. Name the 5 clues for a chemical change: __________________________
___________________________________________________________
Give 3 examples: ____________________________________________
9. Define physical change: ________________________________________
____________________________________________________________
Name some clues for a physical change: ___________________________
____________________________________________________________
Give 3 examples: _____________________________________________
10. A student is investigating different types of bean seeds. The growing plants
receive the same amount of sunlight and water and are planted in the same soil. Which question is the investigation designed to answer? __________________
________________________________________________________________
11. Put P for Physical or C for chemical changes: milk getting sour and chunky
when it is mixed with vinegar ____, salt mixing with pepper ____, burning paper _____, adding drops of dye to water ____, adding drops of iodine to starch ____,
forming a solid after adding two liquids together ____, baking soda mixing with vinegar ____, a chemical mixed with water causes the test tube to get warm ___.
12. Ice being broken into small bits is an example of a ____________change.
13. A clue that a chemical change is occurring in a burning flame is that ___________ is given off.
14. In a physical change the matter does not change ___________________.
15. In a chemical change a _________substance is formed.
16. A chemical _____________is a way to describe how matter reacts with other matter.
17. _____________ is the substance produced by iron reacting with oxygen in the air.
18. What are organic compounds? ______________________________________
19.
Can we tell if this compound is organic or inorganic? How?