Thames & Kosmos Barbie Plant Science Kit: Science at the Farm handleiding
Handleiding
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It’s easy to observe germination and growth with cress plants because they sprout
quickly. Seeds contain all of the food, or nutrients, that young plants need for their
early growth, so they can also grow on a damp paper towel. The cress doesn’t like
the water with the soap or salt in it. Here, these additives are called contaminates.
The test samples shrivel because salt and dish soap have a harmful effect on
plants. External conditions are very important when growing plants. In order to
thrive, they need nutrients.
Plants also need water, warmth, and air. In the greenhouse, the warmed air
isn’t carried away as easily as outside, which is why the plants grow faster there than
outside of it. You can buy vegetables from supermarkets even in the winter, thanks to large-scale
greenhouses. It would be too cold in many parts of the world to grow plants outside during the
winter, but in a greenhouse it is warm even during the colder months.
Cress Tests
EXPERIMENT
You will need: 4 pots of cress from previous
experiment, sticker labels, greenhouse, 3 plastic
cups, table salt, dish soap, spoon
1
Label the small pots “1” through “4.”
2
Fill the three plastic cups with water.
3
Label the first cup “tap water.” Stir one
teaspoon of salt into the second cup and label
it “salty water.” Stir one teaspoon of dish soap
into the third cup and label it “soapy water.”
4
Now and for the next five days, water the cress
plants in pots 1 and 2 with tap water; water
cress pot 3 with salty water; and water cress
pot 4 with soapy water. Use a different spoon
for each type of water, or clean the spoon
completely between using each type of water.
What happens to the plants in all four pots?
What can you conclude about the effects of
the salt and soap on the plants?
5
Put pot 2 in the greenhouse and keep pot 1
outside of it. Keep both on the windowsill. For
the next nine days, water both pots the same
amount. What happens to the plants?
1
2
4
5
2
5
9
WHAT’S
HAPPENING?
3
9
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Barbie Plant Science Kit: Science at the Farm |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 15672 MB |
