What are the components needed in order for an experiment to be valid? Identify these components in the following experiment: A
scientist is testing a new plant food to see if it causes plants to grow faster. The scientist tests two plants with the new plant food, and two plants he grows without plant food
Answer: The scientist tests two plants with the new plant food, and two plants he grows without plant food.
Explanation:
A control is a sample which is kept constant in an experiment. It is kept as a benchmark for comparison with the test variables to observe the changes in the test variables. The use of control in an experiment is valid as it helps in determining the effect of one variable over the other or if the sample is not treated with any variable.
The scientist tests two plants with the new plant food, and two plants he grows without plant food. is the correct option. It is valid as in this two control samples are kept like two plants which grows without plant food used to compare with those who receive the plant food. Thus it will highlight the effect of plant food on growth.
Well for it to be valid you are going to need a hypothesis,control,and variables. The control should be the plant food since it stays constant. And the variables should be the 2 different plants.
Assuming no overturning took place, all fossils that are above the (d i k e) are younger than the (d i k e) as the fossils that are above the (d i k e) are still visible.
If a person built a bridge that didn’t have water holes under it than the other side of the river would drought and kill all animals depending on that sorce of water
Desertification can be defined as encroachment of deserts to areas that were not originally deserts which leads to loss of biological productivity. desertification is caused by some factors which are
Climate Change
human activities
loss of moisture
drought.
When the above mentioned factors farming, overgrazing, climate change, and/or seasonal drought set in then it changed farmland into land that cannot support plant life.
