Question

E. Tick (v) the most appropriate answer. 1. Chemical changes are the result of absorption or release of : (a) heat energy only STE (b) light energy only (c) sound energy only (d) some kind of energy 2. A chemical change involves : (a) change of state only (b) change of colour only (c) change in state as well as composition (d) none of these 3. A physical change is a : (a) temporary change (b) permanent change (c) temporary change which can be reversed (d) none of these 4. An example of a physical change is : (a) magnetilation of iron (b) burning of wood (C) photosynthesis by plants (d) digestich of food a chemical change is : (a) expo photographic film to sunlight 5. An еxаmрlе, а​

Answer 1

Answer:

It’s so easy to put exercise and activity to the bottom of your long to-do list. But being active is one of the most important things you can do, each day if you can, for good health.

While you may not be able to reduce time for other commitments, you might try to squeeze short bursts of activity into your busy life. Every bit helps.

You’re likely to have more success at including exercise into your life if you:

consult an Australian registered exercise professional (AusREP), accredited exercise physiologist or physiotherapist for advice on exercising safely and avoiding injury

choose activities that appeal to you

track your progress (and feel good about your achievements!)

learn an exercise or two you can do quickly and easily for days when you’re feeling particularly time-poor

devise a realistic exercise plan for your lifestyle and routine.

Remember, any exercise is better than none, and you can make it quick and easy if that’s all the time you have. By making time for activity everyday you’ll be setting yourself up for better long-term health.

Answer 2

Answer:

(a) A substance with different chemical properties is formed.

A chemical change occurs when two substances react chemically to form new substances with different chemical properties.