Question

define the following. 1) element 2)physical change 3)involuntary muscle​

Answer 1

Explanation:

Element - any substance that cannot be decomposed into simpler substances by ordinary chemical processes.

Physical Change - Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

Involuntary Muscule - Involuntary muscles are also called as the Unstriped or non-striated muscles. These muscles can be defined as the muscles that functions or contracts without conscious control and are controlled by the. ... Cardiac Muscles, Smooth Muscles, and Skeletal Muscles are examples of Involuntary Muscles.

Answer 2

1) Element- It is a pure substance consisting only of atoms that all have same number of protons in their atomic neuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by chemical means.

2) Physical change- They are the changes which affect the form of a chemical substance, but not it's chemical composition. Physical changes are used to separate mixtures into their chemical compounds, but cannot usually be used to separate compounds into chemical elements or simpler compounds.

3) Involuntary muscle- These muscles can be defined as the muscles that functions or contracts without consious control to move the forearm. They are found in intestine, throat, uterus, blood vessel walls. Cardiac muscles, Smooth muscles and skeletal muscles are examples of involuntary muscles.

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