Answer the following question given this paragraph: Oxidation can be defined as the addition of oxygen to a molecule or the removal of hydrogen from a molecule. When an alkane is heated in the presence of an appropriate catalyst, it can be oxidized to the corresponding alkene in a reaction called a dehydrogenation reaction. Two hydrogen atoms are removed in the process. The alkene can be further oxidized to an alkyne by the removal of two more hydrogen atoms. Q: What is the addition of oxygen to a molecule or the removal of hydrogen from a molecule called? Choices: - precipitation - evaporation - ionization - oxidation A:
oxidation
(Question)
Answer the following question given this paragraph: The stem of a horsetail is characterized by the presence of joints, or nodes: hence the name Arthrophyta, which means "jointed plant". Leaves and branches come out as whorls from the evenly spaced rings. The needle-shaped leaves do not contribute greatly to photosynthesis, the majority of which takes place in the green stem (Figure 14.15). Q: The stem of a horsetail is characterized by the presence of joints, or nodes: hence the name arthrophyta, which means this? Choices: - solid plant - molted plant - elongated plant - jointed plant A:
(Answer)
jointed plant
Ques: Answer the following question given this paragraph: Scientists use models to help them understand and explain ideas. Models explain objects or systems in a more simple way. Models often only show only a part of a system. The real situation is more complicated. Models help scientists to make predictions about complex systems. Some models are something that you can see or touch. Other types of models use an idea or numbers. Each type is useful in certain ways. Q: What do scientists use to help explain objects or systems in simpler ways? Choices: - theories - measurements - plants - models A:
Ans: models
(Q).
Answer the following question given this paragraph: Q: What is energy from the sun called? Choices: - potential energy - thermodynamic energy - kinetic energy - solar energy A:
(A).
solar energy
Ques:Answer the following question given this paragraph: New land can be created by volcanic eruptions. Q: New land can be created when what happens to a volcano? Choices: - it evolves - it dies - it stays dormant - it erupts A:

Ans:it erupts
Ques:Answer the following question given this paragraph: Wave amplitude of a transverse wave is the difference in height between a crest and the resting position. Wave amplitude of a longitudinal wave is the distance between particles of the medium where it is compressed by the wave. Q: Wave amplitude of a transverse wave is the difference in height between what and the resting position? Choices: - a valley - a cascade - a magnitude - a crest A:

Ans:
a crest