3914447
Description
Flashcards by Saphire Rodigruex, updated more than 1 year ago
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Created by Saphire Rodigruex
about 9 years ago
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| Question | Answer |
| Mass | Stuff inside of you |
| gravity | pulls you to earth so you don't float up into space |
| weight | =mass (kg)x gravity (N/kg) |
| photosynthisis | water + carbon dioxide light ----------------------------- chlorophyll oxygen and glucose |
| Spring investigation | Measure the spring at the start. add the weight and measure the difference in the length of spring. see how far the spring has stretched. |
| Friction | Two surfaces rubbing together. Slows things down. |
| balanced and unbalanced forces | Balanced forces= when the two forces pushing on the object are equal -this can ether cause an object not to move or move at a non-changing pace. Unbalanced for= When one of the forces pushing on the object is stronger than the other one - this causes the object to move - forces can move in any direction |
| Forces | - Measured in Newtons with a newton meter - forces can change the speed, direction or shape of an object |
| leaf starch test | Kill the leaf: - put it in boiling water -put in a test tube full of alcohol - put the test tube with leaf in into the boiling water - now the leaf is put on a white tile Testing: - add a few drops of iodine - if the iodine changes from brown to blue- black then starch is present. |
| beuret | Tests for protein. it starts off blue but if there is protein present it changes to purple. - Food is crushed up then beuret is added |
| Benedict solution | -Test for sugar -Foo din test tube heated up with solution - If sugar is not present it remains blue. I f present then red is the most and yellow is sort of. Orange is quite a lot.. |
| iodine | Test for starch - if present the iodine when dropped on the food will change from brown to blue- black |
| Fat | food is rubbed on grease paper and if a transparent greasy smudge appears then fat is present. |
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