understand the core ideas about acids and bases; explain how the key ideas of acids and bases develop at more advanced levels; identify common misconceptions and know how these can be addressed or how ...

There's also a Level 3 out of 5 threat for strong to severe storms Saturday. Bundle up! It's a cloudy and cold start to the day. Temperatures on Thursday afternoon are expected to be chilly in the ...

PHILADELPHIA (WPVI) -- The Victory Parade will feature sunshine and a cold wind before another storm arrives this weekend. THURSDAY: Pockets of drizzle with mostly cloudy skies and some late day ...

MEMPHIS, Tenn. - Our warm weather ends tonight. Next week looks wet. According to weather models we could receive 4-6″ of rain over the next week or so. I'm tracking several rounds of heavy ...

Clouds increase this evening before rain, snow, and a wintry mix move into the region early Tuesday morning. Temperatures tumble into the 20s and low 30s overnight as the winter storm marches in. A ...

The first disturbance we’re tracking is an ocean storm set to track well south of southern New England Tuesday night. Most cities will remain dry. The South Coast, Cape, and Islands may see a dusting.