B. Warm water rises because it is less dense than cool water.
C. Pancake batter cooks quickly after being spooned onto a hot griddle.
D. Our atmosphere is constantly being heated by the sun.
Answer: D. Our atmosphere is constantly being heated by the sun.
Radiation is the transmission of energy in the form of waves or particles released by one source and absorbed by another source. Types of radiations includes electromagnetic radiation, particle radiation, acoustic radiations and gravitational radiations.
Our atmosphere is constantly being heated by the sun is the example of the radiation because the sun radiates energy in all directions in the form of heat, light and radiations. Solar energy in the form of radiation is either reflected back to the sun or it is absorbed by the earth atmosphere. Therefore, this causes heating up of the earth atmosphere.
Answer:
Independent variable: Glass of milk
Dependent variable: Time of sleep
Control variable: same type of milk
Explanation:
Independent variable in an experiment refers to the variable that the experimenter manipulates or changes in order to get a response in another variable (dependent). In this case, the independent variable is the GLASS OF MILK taken before bed.
Dependent variable is that variable that is measured in an experiment. It is the variable that responds to the changes made to the independent variable. In this experiment, the dependent variable is the TIME OF SLEEP of the students.
A control variable or constant is the variable that is kept unchanged throughout the course of the experiment in order not to alter the outcome of the experiment. In this experiment, a control variable can be the SAME TYPE OF MILK taken by each student.
In this milk-drinking sleep experiment, the independent variable is drinking milk at bedtime, the dependent variable's sleep length, and control variables could include other dietary factors, ambient room temperature, bedtime, etc.
In an experimental design, the independent, dependent, and control variables help us isolate cause and effect relationships. In this case, the independent variable would be drinking a glass of milk before bed. This is the variable manipulated or changed in the experiment. The dependent variable is the length of sleep, as it's believed to be influenced by the milk-drinking behavior. Finally, there are multiple potential control variables - factors kept constant to ensure any changes in sleep length are due to the milk intake and not other variables. Such control variables could include the type and volumes of all other consumables, ambient room temperature, time of going to bed, physical activity levels during the day, etc.
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Answer:
An organism has a homozygous dominant trait if he has a BB allele.
Explanation:
An organism with two copy of same allele BB or bb considers as homozygous. These homozygous alleles can be recessive bb which is generally masked by dominant if present in combination or dominant BB in nature. Dominant characters or traits are commonly shown by capital letters and recessive traits are shown by small letters. Dominant traits generally appear more then recessive in phenotypes.
Hence, If an organism has allele BB then he has a homozygous dominant trait.
Answer:
Test Crosses. A test cross is utilized to decide the genotype of a person with a attribute.
Explanation:
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