Science Test Tomorrow 1-23-25 Flashcards

MAKE SURE TO STUDY THE CONCPET AND UNDERSTAND IT

1
Q

Physical reaction

A

A change that alters the form or appearance of a substance but does not make it into a new substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Chemical reaction

A

Change in matter that produces one or more substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Where are the reactants and products of a chemical equation located?

A

Reactants-before yield sign/—>
Products-after yield sign/—>

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  • What is the principle of conservation of mass? What is an example?
A

EXAMPLES:
Alka-Seltzer tablet lab
Pg 58: iron and sulfur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Principle of Conservation of Mass

A

in a chemical reaction, the total mass of the reactants must equal the total mass of the products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the difference between an open and closed system? What is an example of each?

A

Open System: matter can enter from or escape to the surroundings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Closed System:

A

matter is not allowed to enter or leave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Examples of an open and closed System

A

Open-burned out fire, burning match
Closed-pear decaying under glass, chemical reaction inside a sealed plastic bag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Do you know how to balance an equation?
Can you identify it as synthesis, decomposition, single replacement, or double replacement?

A

To balance, multiply subscripts in elements by coefficients until the numbers on both sides of the line equal each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly