Sigmund Freud
He realized that some elements had not been found.
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A scientist is someone who studies science.
1. A scientist must be curious about the world.2. A scientist is logical and systematic.3. A scientist is open-minded and free of bias.4. A scientist is intellectually honest.5. A scientist works hard and is persistent.6. A scientist does not jump to conclusions.7. A scientist is a creative and critical thinker.
Joseph Proust.
Sigmund Freud
A scientist named proust discovered it in 1779 A.D.
George Simon Ohm
Controlled variables are quantities that a scientist wants to remain constant and observe as carefully as the dependent variables.
He realized that some elements had not been found.
Scientists change the independent variable but measure the dependent variable; other variables are kept constant.
The law of conservation of mass was formulated by the French scientist Antoine Lavoisier in 1789. He demonstrated that in a closed system, the total mass remains constant in a chemical reaction, even if the substances change form.
The scientist who helped prepare the way for Dalton's work by developing the law of constant composition was Joseph Proust. Proust formulated this law, also known as the law of definite proportions, which states that a given compound always has the same elements in the same proportion by mass.
Boyle's law is named after the scientist Robert Boyle, an Irish natural philosopher, chemist, physicist, and inventor. He discovered the relationship between the pressure and volume of a gas at constant temperature.
A constant variable is one that is not the independent variable (the one you are changing) or the dependent variable (the one you change). Constant variables are so named because in order for the experiment to be legitimate, it is expected that the scientist control them, thus keeping them constant across all trials. This ensures that changes in the dependent variable are only the result of changes in the independent variable.
A scientist may constantly change the variables being tested or manipulated during an experiment to understand their impact on the outcome. By systematically altering one variable at a time while keeping others constant, the scientist can identify cause-effect relationships and draw conclusions about the phenomenon being studied.