Science Quiz

Surface tension is a property of

• liquids, only.

• solids, only.

• gases and solids.

• gases and liquids.

Which law can be used to calculate pressure and volume changes at a constant temperature?

• Boyle's law

• Charles's law

• Kelvin's law

• Dalton's law

Lava often flows into the ocean from volcanoes. A student wonders how much energy the ocean water absorbs when lava flows into it and cools. The student finds the data shown in the table. Temperature of molten lava: 1000°C Specific heat of lava: 1.05 kJ/kg°C Use the equation Q = mc T to calculate the amount of energy absorbed by ocean water when it cools 1.00 kilogram of lava to a temperature of 100°.

• 900 kJ

• 945 kJ

• 1,050 kJ

• 1,155 kJ

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Which statement describes the main characteristic used to organize elements in the periodic table?

• They are organized according to the number of protons in each element.

• They are organized according to the number of electrons in each element.

• They are organized according to the total number of protons and neutrons in each element.

• They are organized according to the total number of electrons and protons in each element.

The general equation of alpha decay is shown. Which particle is emitted during an alpha decay?

• a proton

• a neutron

• an electron

• a helium nucleus

Tags

NGSS.HS-PS1-8

Which conclusion was a direct result of the gold foil experiment?

• An atom is composed of at least three types of subatomic particles.

• An electron has a positive charge and is located inside the nucleus.

• An electron has properties of both waves and particles.

• An atom is mostly empty space with a dense, positively charged nucleus.

Which matches the elements in the compound to the correct chemical formula?

• lithium and bromine - Li₂Br

• potassium and oxygen - KO₂

• magnesium and fluorine - MgF₂

• calcium and phosphorus - CaP₂

The model shows an alpha decay. What happens to the atomic number of a parent nucleus during the reaction?

• It increases by 1

• It decreases by 1

• It increases by 2

• It decreases by 2

Tags

NGSS.HS-PS1-8

What is the change in reactivity of alkali metals when moving down Group 1 of the Periodic Table?

• The reactivity decreases

• The reactivity increases

• The reactivity becomes zero

• The reactivity remains constant

Tags

NGSS.HS-PS1-2

What is true about the metals in groups 1A, 2A, and 3A?

• They gain electrons when they form ions

• They all have ions with a 1+ charge

• They all have ions with a 1- charge

• They lose electrons when they form ions