Atomic Theory / Road Salt

Which scientist proposed that atoms are mainly empty space?

• Bohr

• Rutherford

• Dalton

• Gruber

Dalton proposed that atoms were ________ spheres with ________ mass.

• Hollow - no

• Solid. - same

• Solid. - different

• Hollow. - different

Bohr proposed that electrons traveled around the nucleus in

• rings.

• pudding.

• clouds.

• airplanes.

Click all that are true

• The electron was discovered by Chadwick

• The protons are found in the nucleus

• The neutron was discovered by Chadwick

• The electrons are found in the nucleus.

• The neutrons are found in the nucleus.

According the the article, if nothing is done about the salt contamination of our lakes, in 30 yrs many will not be able to support fish.

• True

• False

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

According to the article, the _______ (more / less) pavement that surrounds a lake the more salt will be found in it.

Tags

NGSS.MS-ESS3-4

A 500 meter perimeter of ________ can protect a lake from salt contamination.

• concrete

• sodium chloride

• vegetation (grass and trees)

• swimming beaches

Check the 2 options that should be switched around in the following list of steps of how the atomic model transformed.

• Atoms are made of SOLID spheres of different masses

• Atoms have a positive nucleus that contains protons and NEUTRONS with electrons in defined rings

• Atoms have a large positive sphere with ELECTRONS ORBITING around it

• Atoms are mostly EMPTY SPACE with a solid positive nucleus and scattered electron on the outside.

• Atoms are positive spheres that have embedded negative electrons

Tags

NGSS.MS-PS1-1

Mr. Nelson wants to catch as many fish as Mr. Gruber. He uses a shiner lure AND reels in the bait slower. He now catches twice as many fish as Mr. Gruber. What can he conclude about why he is catching more fish?