Answer to 9 is b (because bodily fluid is the easiest way to contract a disease)
And answer to 10 is a (because the disease is transferred by saliva)
Answer:
Due to the gravitational force of the sun and the moon the tides behave as blank waves.
Explanation:
Tides waves are usually the up and down movement of waves. Tides wave formed by the gravitational force of the Earth,moon and sun.the sun and moon’s gravitational force pulls up the ocean to tilts towards the earth because of this reason t the tides rise up and down. Moreover the waves in water sticks to its governing principle that 's why it makes sound
Hypothesis is a proposed explanation which is made on the basis of given experimental data taken as starting point for further investigation. All hypothesis test are conducted in a same manner fiollowing the four main steps:
1. State the hypothesis
2. Formulate an analysis plan
3. Analyzing the data obtained
4. Final step is to analyze the results
There are three types of variables taken in an experiment:
1. Independent variable: light, temperature, humidity
2. Dependent Variable: these depends upon the other variable. changes in the independent variable may cause the dependent variable to change, for example, growth of plant is a dependent variable which depends upon the amount of light(independent variable), the plant receives
3. Controlled Variable: these variable can be controlled and prevented from being change like ty[pe of plant, type of soil
