Q3. (a) some research has shown that increased use of computers and other digital media can affect
eyesight and reaction times.
a scientist wanted to test if prolonged use of a computer affected reaction time.
the scientist tested the reaction times of 10 people under the same environmental conditions.
these people then used a computer for three hours.
the scientist tested their reaction time again.
give three ways that the scientist could improve this method to determine if prolonged use of a
computer affects reaction time.

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

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