Why isn't all the content on the landing page showing up on my mobile device?

I was testing the http://blackmothersunited.wsbydesign.com responsive design via my Galaxy Samsung 6 this morning and discovered that the following either do not show up on the screen at all or only partially appear.
- Splash image (i.e., Mother and Baby)
- Image associated with Testimonials (i.e., the small icon next to quote)
- Text in the Footer (i.e., the quote)
- Form's Send button (only partially appears)

In addition, there's a huge amount of space between the end of the Testimonial section and the beginning of the Newsletter section.

What do I need to do to correct this?