DSWO WEEK 29
4-23 Life - Food Chain - sequencing
A food chain shows the chain of predators and prey in an environment. How are marsh hawks, lily pads, frogs, insects, and snakes related in a pond's food cahin?
4-24 Earth - Solar System - predicting
A black hole is a tiny collapsed star that has an extremely strong gravitational pull. What happens when something comes near a black hole?
4-25 Physical - Matter - Design an experiment
How can you find out whether water evaporates from a leaf?
4-23 Lily pads are eaten by insects. Insects are eaten by frogs. Frogs are eaten by snakes. Snakes are eaten by hawks.
4-24 Whatever gets near a black hole is pulled into it. A black hole has such strong gravitational force that not even light can escape its pull.
4-25 If water evaporates from leaves, it will go into the air. Since you cannot observe this, you need to fins a way to catch the water before it is absorbed from the leaf of a growing plant. One way to do this would be to place a dry plastic bag over a leaf and tie it securely to the branch to which the leaf is attached. After a day or so, the bag will have beads of moisture if the leaf gave off water.