Which of the following is a chemical change Asvab?
ASVAB
| Question | Answer |
|---|---|
| what is the symbol for hydroxx ion | OH- |
| the tympanic membranes are also known as the | ear drums |
| which of the following reactions produce a chemical change | adding salt into hot water |
| choking is presented by the | epiglottis covering the voice box |
Which actions produce a chemical change?
Chemical Change. Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.
Which of the following presents the stages of the water cycle in the correct order?
They are evaporation, condensation, precipitation and collection.
When sodium atoms form sodium ions they what?
A neutral sodium atom, for example, contains 11 protons and 11 electrons. By removing an electron from this atom we get a positively charged Na+ ion that has a net charge of +1. Atoms that gain extra electrons become negatively charged.
Is there chemistry on the Asvab?
The fourth and final part of our free ASVAB Science Study Guide covers chemistry. Subtopics include matter, atomic structure, chemical equations, and the pH scale. It's important to know the basic concepts of chemistry as well the most common vocabulary terms.
What reduces friction sandpaper?
As the sandpaper got to a certain roughness the grains of sand where larger which decreased the over all contact area and reduced the friction. The grains are larger so there will be fewer contact points. One example of this is when you wear cleats on a smooth hard surface you slip all over the place.
How smooth round stone became smooth?
Which of these is the best explanation of how a smooth round stone became smooth? It was in a stream for a long time.
What kind of properties can only be observed when a substance changes into a different substance?
Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.
Which of the following stages of the water cycle is responsible for getting water into the atmosphere?
Evaporation and transpiration change liquid water into vapor, which ascends into the atmosphere due to rising air currents.
What are the 5 stages of water cycle?
There are five processes at work in the hydrologic cycle: condensation, precipitation, infiltration, runoff, and evapotranspiration. These occur simultaneously and, except for precipitation, continuously.
Why is it necessary to use a Greek prefix to name binary covalent compounds?
Why is it necessary to use a system of Greek prefixes to name binary covalent compounds? Different compounds can be formed of the same elements, so the prefixes are needed to distinguish different binary compounds.
How many science questions are on the ASVAB?
The CAT-ASVAB General Science test consists of 16 questions to be completed within 8 minutes. This portion of the exam covers a wide variety of topics including life science, earth science and physical science….
| A | Natural selection |
|---|---|
| D | Artificial selection |
How does a smooth round stone became smooth?
2) “ may came home with a smooth round stone as small as a world and as large as alone” a)How do you think the stone became smooth and round? Ans) The stone became smooth and round due to erosion.
How many feet of chain fence are necessary to enclose a dog pen that is square and has an area of 64?
How many feet of chain fence are necessary to enclose a dog pen that is square and has an area of 64 square feet. 32 ft of chain fence is required.
What is the ability of the substance to react with another substance?
Chemical properties describe the characteristic ability of a substance to react to form new substances; they include its flammability and susceptibility to corrosion.
What are properties of liquids?
The most obvious physical properties of a liquid are its retention of volume and its conformation to the shape of its container. When a liquid substance is poured into a vessel, it takes the shape of the vessel, and, as long as the substance stays in the liquid state, it will remain inside the vessel.
What are the stages of water cycle?
The water cycle consists of three major processes: evaporation, condensation, and precipitation. Evaporation is the process of a liquid's surface changing to a gas. In the water cycle, liquid water (in the ocean, lakes, or rivers) evaporates and becomes water vapor.
When did scientists discover the water cycle?
The first published thinker to assert that rainfall alone was sufficient for the maintenance of rivers was Bernard Palissy (1580 CE), who is often credited as the "discoverer" of the modern theory of the water cycle.
What is the scientific name for the water cycle?
Earth's water is always in movement, and the natural water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth.
What is water cycle short answer?
The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.
Do the compounds combine metals with metals metals with non metals or non metals with nonmetals?
b. Do the compounds combine metals with metals, metals with nonmetals, or nonmetals with nonmetals? Nonmetals are combined with nonmetals in the molecular compounds shown.
Why do you think prefixes are necessary for covalent compounds but not ionic compounds?
Summary. Covalent inorganic compounds are named by a procedure similar to that used for ionic compounds, using prefixes to indicate the numbers of atoms in the molecular formula. The simplest organic compounds are the hydrocarbons, which contain only carbon and hydrogen.
How do I pass the 2021 ASVAB?
0:524:05How to pass ASVAB test 2021 – YouTubeYouTube
How many questions are on the 2021 ASVAB?
225 questions The Student ASVAB. The MET-site ASVAB has 225 questions and a cap of 149 minutes.
What is it called when a lobster grows a new claw?
When a Lobster grows a claw to replace one that was lost, the process is called. Regeneration.
What is the ability of a substance to resistance to flow?
Viscosity is a measure of a fluid's resistance to flow.
When observing a chemical reaction you might feel a chemical change in?
Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
What is the ability of liquid to resist flowing?
Viscosity is a measure of a fluid's resistance to flow. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its molecular makeup results in very little friction when it is in motion.
How does the liquid flows?
Liquids flow because the intermolecular forces between molecules are weak enough to allow the molecules to move around relative to one another. Intermolecular forces are the forces between neighboring molecules.
How do clouds form?
Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals. For this to happen, the parcel of air must be saturated, i.e. unable to hold all the water it contains in vapor form, so it starts to condense into a liquid or solid form.