Investigation+under+construction


 * IDEAS FOR TASKS AND INVESTIGATIONS **

Sam hypothesized that there's a chemical that bananas give out that cause ripening. Design an experiment to test Sam's hypothesis.

Plan and carry out an experiment on 'how concentration of ethylene affects ripening of bananas'

Grade 7: Find out with vinegar is most acidic using acid base titration []

Make a distiller using aluminum can with screw top and rubber tubes.

Students investigate on the advantages, disadvantages and limitations of zoo as a place for tourism, animal protection, reproduction and research.

Students design and carry out a heat powered desalinator as part of a water investigation

Produce a simple, fun and effective video to describe an investigation: @http://www.merrell.com/US/en-US/Product.mvc.aspx/26352M/0/Mens/Portage-Web?dimensions=0

Possible experiment for next unit: ** Students will determine the relationship between the height of bounce of a ping-pong ball and the height from which it was dropped **

Grade 7 essay Diseases and epidemics

1) Advantages and disadvantages of our responses to diseases and epidemics

2) How does our solutions to diseases and epidemics work? (scientific understanding)

3) Describe the impact of the solutions and responses in (1) and (2) to a few of the following factors -

1) Factors affecting fragrance of perfume


 * How is perfume made?
 * How are we affected by fragrance?
 * How can we manipulate variables to change fragrance?

2) Factors affecting formation of mold on bread


 * How can we //**accelerate**// the growth of mold?
 * How can we //**decelerate**// the growth of mold?

3) Factors affecting friction Background:


 * 1) students place a block of wood on an inclined slope. What enhances the friction of the wood block? What takes away friction of the wood block? How can we measure friction?
 * 2) students investigates the effect of air friction by constructing parachutes, catapults, rubber slings.

Concepts: Friction, gravity, angle and inclination, physical property - temperature.

4) Factors affecting height of coke eruption.

concepts: reactive surface area, height measurement

5) Effect of alkali on rate of iron nail dissolving in coke's phosporic acid

concepts - acid, alkali, neutralization, rate, control sample

http://joshmadison.com/article/will-coke-dissolve-a-nail-experiment/

6) Factors affecting crystallization

A glossary of scientific terms