Cumulus and stratus clouds belong to which cloud group?

A. Puffy clouds
B. High clouds
C. Middle clouds
D. Low clouds
Is it A?

What is the basic cause of ocean tides?
A. Gravitational force of volcanic activity
B. Gravitational attraction between the Moon and the entire solar system
C. Gravitational force of atmospheric pressure
D. Gravitational attraction between Earth, the Moon, and the Sun
Is it D?

looks good to me.

What is the basic cause of ocean tides?

D. Gravitational attraction between Earth, the Moon, and the Sun

It's D

For the first question, the options provided are A, B, C, and D. To determine which cloud group cumulus and stratus clouds belong to, we can start by understanding the different cloud groups. Clouds are classified into three main groups based on their altitude:

1. High clouds: These clouds form at high altitudes, usually above 20,000 feet (6,000 meters). Examples include cirrus and cirrostratus clouds.

2. Middle clouds: These clouds form at medium altitudes, usually between 6,500 to 20,000 feet (2,000 to 6,000 meters). Examples include altostratus and altocumulus clouds.

3. Low clouds: These clouds form at low altitudes, below 6,500 feet (2,000 meters). Examples include stratus and stratocumulus clouds.

Given this information, we can determine that cumulus and stratus clouds belong to the low cloud group, as they form at low altitudes. Therefore, the correct answer is D: Low clouds.

For the second question, let's consider the options provided:

A. Gravitational force of volcanic activity: Volcanic activity does not play a significant role in causing ocean tides. This option can be ruled out.

B. Gravitational attraction between the Moon and the entire solar system: While the Moon's gravitational attraction does impact ocean tides, it is not the entire solar system that has an effect. This option can be ruled out.

C. Gravitational force of atmospheric pressure: Atmospheric pressure does influence weather patterns, but it is not the primary cause of ocean tides. This option can be ruled out.

D. Gravitational attraction between Earth, the Moon, and the Sun: This option correctly identifies the basic cause of ocean tides. The gravitational forces between the Earth, the Moon, and the Sun combine to create the tidal effects we observe. Therefore, the correct answer is D: Gravitational attraction between Earth, the Moon, and the Sun.