What is the difference between sedimentary and igneous rocks? There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. They accumulate in layers. What are […]
What is the relationship between heat and the density of air?
What is the relationship between heat and the density of air? As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot […]
How does airplane wing work?
Can a balloon make it to space?
Can a balloon make it to space? A helium-filled balloon can float very high up into the atmosphere, however, it cannot float up into outer space. The balloon can only rise up until the atmosphere surrounding it has the same weight as the helium in the balloon. This happens at about a height of 20 […]
Why do both bumper cars stop after crash?
Why do both bumper cars stop after crash? If kinetic energy before is the same as after, then the collision is elastic. Interactions between molecules are examples of perfectly elastic collisions. If two bumper cars collide head-on in a fairground and both cars come to a stop due to the collision, kinetic energy is obviously […]
How do you analyze student progress?
How do you analyze student progress? There are four main ways to track your students’ progress. Curriculum based monitoring tests. The teacher uses standardized tests that include all the material presented over the duration of the year. Observation and interaction. Frequent evaluations. Formative assessment. What factors do you think most contribute to student success? Family […]
What is another word for Zenith?
What is another word for Zenith? What is another word for zenith? peak pinnacle apex height summit top acme apogee climax culmination How do you use Zenith? Zenith sentence example These years mark the zenith of Athenian greatness. The sun was well past its zenith and headed toward the trees on the west side of […]
What are two crucial functions of the carbon cycle?
What are two crucial functions of the carbon cycle? Photosynthesis and Cellular respiration. What are the three main processes of the carbon cycle? Processes in the carbon cycle Carbon enters the atmosphere as carbon dioxide from respiration and combustion. Carbon dioxide is absorbed by producers to make glucose in photosynthesis. Animals feed on the plant […]
Does sound travel faster in darkness?
Does sound travel faster in darkness? You may wonder, it is because it is quieter at night than in the daytime. Actually, sound transmits farther at night may be related to refraction of sound waves! First, sound is the vibration of air, and it is a kind of wave motion. The propagation of sound wave […]
Is lifting a pushing force?
Is lifting a pushing force? Manual work exists in nearly all industries and includes all forms of moving loads which is done using muscle force in whole or in part. This includes, for example, lifting, tipping, carrying, supporting, pulling, pushing, dragging, loading, shovelling and sorting. What height is pushing or pulling a load the safest? […]