Q: Which bonds are the strongest of the intermolecular forces? Read this paragraph and choose the correct option from the provided answers: As a solid is heated, its particles vibrate more rapidly as the solid absorbs kinetic energy. Eventually, the organization of the particles within the solid structure begins to break down and the solid starts to melt. The melting point is the temperature at which a solid changes into a liquid. At its melting point, the disruptive vibrations of the particles of the solid overcome the attractive forces operating within the solid. As with boiling points, the melting point of a solid is dependent on the strength of those attractive forces. Sodium chloride (NaCl) is an ionic compound that consists of a multitude of strong ionic bonds. Sodium chloride melts at 801C. Ice (solid H 2 O) is a molecular compound whose molecules are held together by hydrogen bonds. Though hydrogen bonds are the strongest of the intermolecular forces, the strength of hydrogen bonds is much less than that of ionic bonds. The melting point of ice is 0C. Choices: - complex - carbon - calcium - hydrogen A:
hydrogen

Q: What is a measure that has both size and direction? Read this paragraph and choose the correct option from the provided answers: Force is a vector, or a measure that has both size and direction. For example, Colton pushes on the ground in the opposite direction that the scooter moves, so that's the direction of the force he is applies. He can give the scooter a strong push or a weak push. That's the size of the force. Like other vectors, a force can be represented with an arrow. You can see some examples in the Figure below . The length of each arrow represents the strength of the force, and the way the arrow points represents the direction of the force. Choices: - length - velocity - wave - vector A:
vector

Q: Q: Earthworms and segmented worms belong to what phylum? Read this paragraph and choose the correct option from the provided answers: The phylum Annelida is made up of segmented worms such as earthworms . Segmented worms are divided into many repeating segments. There are roughly 15,000 species of annelids. Most belong to one of three classes. A species in each class is pictured in Figure below . See The Cambrian Explosion at http://www. pbs. org/kcet/shapeoflife/episodes/explosion. html for an introduction to annelids. Choices: - bryozoa - nematoda - protazoa - annelida A:
A: annelida

Question: Q: What is the biogeochemical cycle that recycles water called? Read this paragraph and choose the correct option from the provided answers: The biogeochemical cycle that recycles water is the water cycle. The water cycle involves a series of interconnected pathways involving both the biotic and abiotic components of the biosphere. Water is obviously an extremely important aspect of every ecosystem. Life cannot exist without water. Many organisms contain a large amount of water in their bodies, and many live in water, so the water cycle is essential to life on Earth. Water continuously moves between living organisms, such as plants, and non-living things, such as clouds, rivers, and oceans ( Figure below ). Choices: - water theory - Liquid Cycle - Water Table - water cycle A:
Answer: water cycle

*Question*
Q: What is the most important muscle involved in the process of breathing? Read this paragraph and choose the correct option from the provided answers: How do lungs allow air in? Air moves into and out of the lungs by the movement of muscles. The most important muscle in the process of breathing is the diaphragm , a sheet of muscle that spreads across the bottom of the rib cage. The diaphragm and rib muscles contract and relax to move air into and out of the lungs. During inhalation, the diaphragm contracts and moves downward. The rib muscles contract and cause the ribs to move outward. This causes the chest volume to increase. Because the chest volume is larger, the air pressure inside the lungs is lower than the air pressure outside. This difference in air pressures causes air to be sucked into the lungs. When the diaphragm and rib muscles relax, air is pushed out of the lungs. Exhalation is similar to letting the air out of a balloon. Choices: - mouth - chest - trachea - diaphragm A:
**Answer**
diaphragm

Q: Q: What is another term for a hand lens? Read this paragraph and choose the correct option from the provided answers: An example of a lens is a hand lens, also called a magnifying glass. This type of lens makes objects look bigger than they really are. How do you think this happens?. Choices: - projecting glass - seeing glass - traversing glass - magnifying glass A:
A: magnifying glass