Classification of Matter
This substance is made of two or more different elements
Compound
In the molecule H2O, how many hydrogen atoms are there?
2 hydrogen atoms
Who is credited with formulating the Law of Conservation of Mass?
Antoine Lavoisier
Attractive force between atoms
polarity
What are the names of the three 8th grade science teachers?
Vlk, Villareal, Amaya
What is the difference between a homogeneous and a heterogeneous mixture?
Homogeneous = evenly distributed (uniform)
Heterogeneous = not evenly distributed
What is the total number of atoms in the compound C₆H₁₂O₆ (glucose)?
24 atoms
What does the Law of Conservation of Mass state?
Mass is neither created nor destroyed, just rearranged. In an equation it has to be equal on both sides.
What property of water allows an insect to walk on water?
Surface tension
How many letter are in the alphabet?
26 letters
H2 + O2 → H2O
Which of these BEST describes oxygen (O) in the reactant
Element
How many hydrogen (H) atoms are in the formula for acetic acid, CH₃COOH?
4 atoms
Does the equation follow the law of conservation of mass? CH4 + O2 → CO2 + 2H2O
No
Water sticks to other materials.
Adhesion
How many stars are in the USA flag?
50 stars
What do you call a substance that cannot be broken down into a simpler substance?
Element
Which elements and how many atoms of each element are present in this formula Ca(NO3)2?
Calcium = 1
Nitrogen = 2
Oxygen = 6
If 10 grams of reactants are used, what will be the mass of the products according to the law of conservation of mass
10 grams
Allows water molecules to stick together.
Cohesion
When was the last time the cowboys won a super bowl?
1996
Kelly's salad has lettuce, olives, and cheese mixed with a fork and for her milkshake she mixed strawberries, milk and sugar in the blender. Is her food heterogeneous or homogeneous mixture?
Salad: Heterogeneous
Milkshake: Homogeneous
What does the subscript tell us in a chemical formula?
The number of atoms for the element
Does this equation follow the law of conservation of mass? 6CO2 + 6H2O → C6H12O6 + 6O2
Yes
Universal solvent
Water
When is your Science STAAR test?
April 21st