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How are physical and chemical changes affected by temperature?
Chemical reactions involve changing the materials that you're dealing with into new materials, and the changes that you see are the result of the appearance of the new materials. The new material might have a different phase than the starting materials. For example, if you create something new from two liquids and it happens to be a gas, then you will get gas bubbles. There will be a new material with a new phase that wasn't there before. Also, you can observe chemical reactions by seeing color changes, if the new material has a different color than the starting materials. When a chemical reaction takes place, usually the temperature will also change. It will either go up or down, sometimes imperceptibly. Those are the kinds of changes that you might see. In chemical reactions the changes that you observe are caused by the creation of or loss of different kinds of materials. Physical changes are similar in some ways because you are looking at the same kinds of things--changes in the phase, the color, the temperature. But the physical changes are changes in the condition of the material or changes caused by mixing materials together or taking them apart--just mixing or separating, not the creation of something new. For example, temperature changes are physical changes if they are caused by heating or cooling. If you add heat to something and the temperature goes up, that is a physical change. If you cool it off and the temperature goes down, that is a physical change. Phase changes are physical changes also, if they are caused by heating or cooling. If you take some water and you heat it up and it changes to gas, that is a physical change. You still have water, only now it is steam instead of liquid. Also included in physical changes are color changes that are caused simply by mixing or by diluting a material or, in some cases, even by heating. For example, if you turn on an electric range and the element gets hot, you can see a color change. That is also a physical change. Physical changes and chemical changes have much in common in that you are looking at similar kinds of results. The difference is whether the appearances or differences that you see are from a change in the condition of the material or from a change in what materials are present. That's the kind of thing you need to look for to distinguish between a chemical reaction and a physical change. It takes an inference to make that distinction. Sometimes it is very difficult to make that distinction and in some cases even chemists can get into arguments sometimes over what constitutes a physical or a chemical change. For example, when salt dissolves in water, some people say that is simply a physical change because if you evaporate away the water, you have the salt back again. Other people argue that there is a chemical change because the material present in solution has different properties than the separated pure water and pure salt. The solution will conduct electricity and the pure water and pure salt will not. So, there are cases where the distinction between physical and chemical changes gets kind of blurred. In a few weeks we will have more criteria we can use to distinguish between physical and chemical changes.
How are chemical and physical change alike?
They are alike because #1 they are a change insubstance, #2 the form is different. I hope i have been a huge help to people who need this for homework!
Can you get headaches when the weather suddenly changes?
Yes, some people are sensitive to changes in weather and may experience headaches or migraines as a result. Rapid changes in temperature, humidity, or barometric pressure can trigger these headaches in susceptible individuals. It is thought that these weather-related headaches are due to changes in the brain's blood vessels or levels of certain chemicals.
What is the relationship between a physical stimulus and the kinds of sensory responses that result from it?
There are five main senses that people experience: sight, smell, taste, touch, and hearing. Each sense is associated with different physical stimuli. For example, the sense of sight is associated with light waves, the sense of smell is associated with volatile molecules, the sense of taste is associated with dissolved molecules, the sense of touch is associated with pressure or temperature changes, and the sense of hearing is associated with sound waves. The relationship between a physical stimulus and the resulting sensory response is that the physical stimulus is converted into a neural signal by the sense organ, and then this neural signal is interpreted by the brain to produce the sensory response. The specific response depends on which sense is involved and what the physical stimulus is.
What are the impacts of a higher percentage of elderly people in the economy of a country?
Elderly people tend to be more law abiding, better off financially (not always) and have a lot of experience to contribute. They also tend to have more health problems and be less tolerant of change. Some judges are appointed for life, for example, to the US Supreme Court. The intent of a life appointment is to place the judges beyond influence. They cannot be put out of office because someone does not like their decisions. That is a good thing. But some of them linger too long after they are starting to lose their faculties to age and illness and that is a bad thing. The more elderly the more retired and the fewer working so the burden on those working is greater.
What some changes experience by people during puberty?
The main change is physical growth. There is also sexual growth as in reaching sexual maturity.
What is an elderly person?
They are the persons who are older in age and experience. Elderly can be people over 40,some one who is older then average adult mainly. Adult: 18-35 Elderly: 40 and up
How do you write a five sentences about changes of physical appearance from birth to death using chronological order?
From birth to death, an individual's physical appearance undergoes significant changes. Babies are born with soft, delicate skin and minimal hair. As they grow into adolescence, their features develop and mature, such as the growth of facial hair in males or the changing of body shape. In adulthood, individuals may experience physical changes like weight gain or loss, wrinkles, and graying hair. Finally, in old age, people tend to experience further skin changes, muscle loss, and other physical signs of aging as they approach death.
When do people experience surging physical growth and sexual maturation?
People experience surging physical growth and sexual maturation during puberty, which typically occurs between the ages of 10 and 14 for girls and 12 and 16 for boys. Hormonal changes during this time lead to the development of secondary sexual characteristics and increased physical growth.
What can indicate physical or chemical changes depending on the cause of the change?
People can
Why dont elderly people get involved in sport?
Elderly people may not get involved in sports due to physical limitations, lack of interest, fear of injury, or simply not prioritizing physical activity. Additionally, some elderly individuals may not have easy access to sports facilities or may not be aware of opportunities for sports participation targeted towards their age group.
What are some physiological changes that effect the elderly people?
Some physiological changes in elderly individuals include decreased muscle mass and strength, reduced bone density leading to osteoporosis, slower metabolism, decreased sensory perception (such as vision and hearing), and decrease in cardiovascular fitness. These changes can impact mobility, balance, and overall health in older adults.
What are some popular stretching exercises for elderly women?
Even though elderly women may not have the flexibility or physical fitness as younger people do, there are still many popular stretching exercises for elderly women. Some of these popular exercises are tricep stretches and double hip rotation.
How did the people adapt to the place?
physical evolution, change of attitudes and ritual changes of habit.
Who is vulnerable to experience low birth weight?
Underweight and malnourished mother is prone to have low birth weight baby. It is shame on the so called today's developed society to have malnourished children on one hand and elderly people doing physical labour beyond their capacity on other hand.
What physical changes occur in red bull?
This product contains high amounts of the drug caffeine. Some people can experience a high or irregular heart rate from drinking it. If the person has a bad heart, they could pass out or even die.
What do elderly people care about?
Elderly people care about being comfortable in their own environment
