True. The Soviets
were the first to send unmanned satellites then rockets that had animals in
it. The U.S. in response funded space
projects and gave additional support to NASA.
It also promoted scientific studies in school as part of their campaign
to gain supremacy in the space race.
Was located in Northeast Africa just south of Ancient Egypt. The main cities of Kush were situated along the Nile River, the White Nile River, and the Blue Nile River. Today, the land of Kush is the country of Sudan. How long did the Kingdom of Kush rule? The Kingdom of Kush lasted for over 1400 years. It was first established around 1070 BCE when it gained its independence from Egypt. It quickly became a major power in Northeast Africa. In 727 BCE, Kush took control of Egypt and ruled until the Assyrians arrived. The empire began to weaken after Rome conquered Egypt and eventually collapsed sometime in the 300s CE.
Answer:
A control should have been included in the investigation
Explanation:
It is impossible for the student to interpret a correct conclusion about his experiment, without adding a control treatment where he can really compare the differences between the variables.
Control treatment is an element of research that receives all factors, except the variable being tested. The control serves to make comparisons with the other treatments, allowing to observe the exact difference between a system where the variable was tested and the system where it was not.
In the case of the question above, it would have been necessary for the student to have placed a cart on a ramp of normal height and without sandpaper. That way he could compare the speed between this cart and the carts on the other ramps, thus having a correct result.
